SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 66)*

                               NL INDUSTRIES, INC.
                                (Name of Issuer)

                         Common Stock, $0.125 par value
                         (Title of Class of Securities)

                                   629156 40 7
                                 (CUSIP Number)

                                STEVEN L. WATSON
                              THREE LINCOLN CENTRE
                                   SUITE 1700
                                5430 LBJ FREEWAY
                            DALLAS, TEXAS 75240-2694
                                 (972) 233-1700
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  July 26, 2002
                      (Date of Event which requires Filing
                               of this Statement)

         If the filing person has  previously  filed a statement on Schedule 13G
to report the  acquisition  that is the  subject of this  Schedule  13D,  and is
filing  this  schedule  because  of  sections   240.13d-1(e),   240.13d-1(f)  or
240.13d-1(g), check the following box. [ ]

         *The  remainder  of this cover page shall be filled out for a reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

         The information  required on the remainder of this cover page shall not
be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise  subject to the  liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  see
the Notes).

                         (Continued on following pages)






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Tremont Corporation

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      WC

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    10,215,541
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     10,215,541

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      10,215,541

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      21.0%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO







CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Tremont Group, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [  ]

             (b)  [  ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    10,215,541
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     10,215,541

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      10,215,541

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      21.0%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Tremont Holdings, LLC

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [  ]

             (b)  [  ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    10,215,541
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     10,215,541

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      10,215,541

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      21.0%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      OO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Valhi, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      WC and BK

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Valhi Group, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Nevada

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      National City Lines, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      NOA, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Dixie Holding Company

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Dixie Rice Agricultural Corporation, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Louisiana

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Southwest Louisiana Land Company, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Louisiana

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Contran Corporation

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Delaware

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      The Combined Master Retirement Trust

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      EP






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Harold Simmons Foundation, Inc.

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      Texas

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,350,931
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                     40,350,931

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      40,350,931

    12       CHECK IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [  ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      82.8%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO






CUSIP No.  629156 40 7

     1       NAME OF REPORTING PERSON
             S.S. OR I.R.S. IDENTIFICATION NO.  OF ABOVE PERSON

                      Harold C. Simmons

     2       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP(SEE INSTRUCTIONS)

             (a)  [   ]

             (b)  [   ]

     3       SEC USE ONLY



     4       SOURCE OF FUNDS (SEE INSTRUCTIONS)

                      Not applicable

     5       CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
             PURSUANT TO ITEMS 2(d) OR 2(e)  [  ]


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      USA

                               7      SOLE VOTING POWER

                                                         15,000
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                    40,420,406
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                          15,000

                               10     SHARED DISPOSITIVE POWER

                                                     40,420,406

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      15,000

    12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
             CERTAIN SHARES (SEE INSTRUCTIONS)  [ X ]

    13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                      0.0%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      IN






                                AMENDMENT NO. 66
                                 TO SCHEDULE 13D

         This amended  statement on Schedule 13D (this  "Statement")  relates to
the common stock,  $0.125 par value per share (the "Shares"),  of NL Industries,
Inc., a New Jersey  corporation  (the  "Company").  Items 2, 3, 4, 5, 6 and 7 of
this Statement are hereby amended as set forth below.

Item 2.  Identity and Background.

         Item 2 is amended as follows:

         (a) This Statement is filed (i) by Tremont Corporation  ("Tremont") and
Valhi,  Inc.  ("Valhi") as the direct  holders of Shares,  (ii) by virtue of the
direct and indirect  ownership of  securities  of Tremont or Valhi (as described
below in this Statement),  by Tremont Group, Inc. ("TGI"), Tremont Holdings, LLC
("TRE  Holdings"),   Valhi  Group,  Inc.  ("VGI"),  National  City  Lines,  Inc.
("National"),  NOA, Inc. ("NOA"), Dixie Holding Company ("Dixie Holding"), Dixie
Rice Agricultural  Corporation,  Inc. ("Dixie Rice"),  Southwest  Louisiana Land
Company,  Inc.  ("Southwest"),  Contran  Corporation  ("Contran"),  The Combined
Master  Retirement  Trust (the "CMRT") and the Harold Simmons  Foundation,  Inc.
(the "Foundation") and (iii) by virtue of his positions with Contran and certain
of the other  entities (as  described in this  Statement),  by Harold C. Simmons
(collectively,  the  "Reporting  Persons").  By  signing  this  Statement,  each
Reporting Person agrees that this Statement is filed on its or his behalf.

         Valhi and Tremont  are the direct  holders of  approximately  61.8% and
21.0%,  respectively,  of the 48,760,384 Shares  outstanding as of July 30, 2002
according to  information  provided by the Company (the  "Outstanding  Shares").
Together,  Valhi and  Tremont  may be deemed to control the  Company.  TGI,  TRE
Holdings  and Valhi  are the  holders  of  approximately  80.0%,  0.1% and 0.1%,
respectively,  of the outstanding shares of common stock of Tremont and together
may be deemed to control Tremont.  Valhi and TRE Holdings are the direct holders
of approximately 80.0% and 20.0%, respectively,  of the outstanding common stock
of TGI.  Together  Valhi and TRE  Holdings  may be deemed to  control  TGI.  The
Company is the sole  member of TRE  Holdings  and may be deemed to  control  TRE
Holdings.  VGI,  National,   Contran,  the  Foundation,   the  Contran  Deferred
Compensation  Trust No. 2 (the "CDCT No. 2") and the CMRT are the direct holders
of approximately  80.6%, 9.5%, 2.1%, 1.4%, 0.4% and 0.1%,  respectively,  of the
common  stock of Valhi.  Together,  VGI,  National  and Contran may be deemed to
control  Valhi.  National,  NOA and Dixie  Holding  are the  direct  holders  of
approximately  73.3%, 11.4% and 15.3%,  respectively,  of the outstanding common
stock of VGI. Together, National, NOA and Dixie Holding may be deemed to control
VGI.  Contran and NOA are the direct holders of  approximately  85.7% and 14.3%,
respectively,  of the  outstanding  common stock of National and together may be
deemed to control  National.  Contran and  Southwest  are the direct  holders of
approximately 49.9% and 50.1%, respectively,  of the outstanding common stock of
NOA and together may be deemed to control NOA.  Dixie Rice is the direct  holder
of 100% of the  outstanding  common stock of Dixie  Holding and may be deemed to
control Dixie Holding.  Contran is the holder of 100% of the outstanding  common
stock of Dixie Rice and may be deemed to control Dixie Rice. Contran is also the
holder of approximately  88.9% of the outstanding  common stock of Southwest and
may be deemed to control Southwest.

         Substantially  all of  Contran's  outstanding  voting  stock is held by
trusts  established  for the benefit of certain  children and  grandchildren  of
Harold C. Simmons (the "Trusts"),  of which Mr. Simmons is the sole trustee.  As
sole trustee of each of the Trusts, Mr. Simmons has the power to vote and direct
the  disposition of the shares of Contran stock held by each of the Trusts.  Mr.
Simmons, however,  disclaims beneficial ownership of any shares of Contran stock
that the Trusts hold.

         The Foundation  directly holds  approximately  1.4% of the  outstanding
Valhi common  stock.  The  Foundation is a tax-exempt  foundation  organized for
charitable  purposes.  Harold C.  Simmons is the chairman of the board and chief
executive officer of the Foundation and may be deemed to control the Foundation.

         The CDCT No. 2 directly  holds  approximately  0.4% of the  outstanding
Valhi common stock. U.S. Bank National  Association serves as the trustee of the
CDCT No. 2. Contran  established the CDCT No. 2 as an irrevocable  "rabbi trust"
to assist Contran in meeting certain deferred  compensation  obligations that it
owes to Harold C. Simmons.  If the CDCT No. 2 assets are insufficient to satisfy
such  obligations,   Contran  is  obligated  to  satisfy  the  balance  of  such
obligations  as they come due.  Pursuant to the terms of the CDCT No. 2, Contran
(i) retains the power to vote the shares of Valhi common stock held  directly by
the CDCT No. 2, (ii) retains dispositive power over such shares and (iii) may be
deemed the indirect beneficial owner of such shares.

         The CMRT directly holds approximately 0.1% of the outstanding shares of
Valhi  common  stock.  Valhi  established  the  CMRT as a trust  to  permit  the
collective  investment  by master  trusts  that  maintain  the assets of certain
employee  benefit plans Valhi and related  companies  adopt.  Mr. Simmons is the
sole trustee of the CMRT and a member of the trust investment  committee for the
CMRT. Mr. Simmons is a participant in one or more of the employee  benefit plans
that invest through the CMRT.

         Valmont Insurance  Company  ("Valmont") and a subsidiary of the Company
directly own  1,000,000  shares and  1,186,200  shares,  respectively,  of Valhi
common stock. Valhi is the direct holder of 100% of the outstanding common stock
of Valmont and may be deemed to control Valmont. Pursuant to Delaware law, Valhi
treats the shares of Valhi common stock that Valmont and the  subsidiary  of the
Company own as treasury  stock for voting  purposes and for the purposes of this
Statement are not deemed outstanding.

         Mr.  Harold C.  Simmons is  chairman  of the board and chief  executive
officer of TGI, Valhi, VGI, National,  NOA, Dixie Holding, Dixie Rice, Southwest
and  Contran.  Mr.  Simmons is also  chairman  of the board of the Company and a
director of Tremont.

         By virtue of the holding of the offices,  the stock  ownership  and his
service as trustee,  all as described  above,  (a) Mr.  Simmons may be deemed to
control the  entities  described  above and (b) Mr.  Simmons and certain of such
entities  may be deemed  to  possess  indirect  beneficial  ownership  of Shares
directly held by certain of such other entities.  However, Mr. Simmons disclaims
beneficial  ownership of the Shares beneficially owned,  directly or indirectly,
by any of such entities.

         Harold C.  Simmons'  spouse is the direct owner of 69,475  Shares.  Mr.
Simmons may be deemed to share indirect beneficial ownership of such Shares. Mr.
Simmons disclaims all such beneficial ownership.

         Certain information  concerning the directors and executive officers of
the Reporting  Persons,  including  offices held by Mr.  Simmons is set forth on
Schedule B attached hereto and incorporated herein by reference.

         (b) The business  addresses of the directors and executive  officers of
the  Reporting  Persons  are set  forth  on  Schedule  B to this  Statement  and
incorporated herein by reference.

         (d) None of the  Reporting  Persons or, to the best  knowledge  of such
persons,  any of the  persons  named in  Schedule B to this  Statement  has been
convicted in a criminal  proceeding  in the past five years  (excluding  traffic
violations or similar misdemeanors).

         (e) None of the  Reporting  Persons or, to the best  knowledge  of such
persons,  any person  named in  Schedule B to this  Statement,  was a party to a
civil proceeding of a judicial or administrative body of competent  jurisdiction
as a result of which such  person was or is  subject  to a  judgment,  decree or
final  order  enjoining  future  violations  of,  or  prohibiting  or  mandating
activities subject to, federal or state securities laws or finding any violation
with respect to such laws.

         (f) Harold C.  Simmons and all the persons  named on Schedule B to this
Statement are citizens of the United  States,  except as otherwise  indicated on
such Schedule.

Item 3.  Source and Amount of Funds or Other Consideration.

         Item 3 is amended as follows.

         The Reporting Persons understand that the funds required by the persons
named in  Schedule B to this  Statement  to acquire  Shares  (other  than Shares
Harold C.  Simmons may be deemed to own  beneficially)  were from such  person's
personal funds.

Item 4.  Purpose of Transaction.

         No change to Item 4 except for the following:

         On July 26,  2002,  Valhi  sent a letter to the board of  directors  of
Tremont  proposing  (the  "Proposal") a merger of Valhi and Tremont  pursuant to
which stockholders of Tremont, other than Valhi, would receive between 2 and 2.5
shares of Valhi's common stock,  par value $0.01 per share, for each outstanding
share of Tremont  common stock held. A copy of the letter is attached  hereto as
Exhibit 1 and incorporated herein by reference (the "Proposal Letter").  On July
26, 2002,  Valhi issued a press release  announcing the Proposal.  A copy of the
press  release  is  attached  hereto  as  Exhibit 2 and  incorporated  herein by
reference.  On July 29, 2002,  Tremont  issued a press  release  announcing  its
receipt of the Proposal  Letter and that Tremont  expects its board of directors
to form a special  committee  comprised of board  members  unrelated to Valhi to
review the Proposal. A copy of the press release is attached hereto as Exhibit 3
and incorporated herein by reference.

         Beginning on July 29, 2002, several purported  stockholder class action
lawsuits were filed against Tremont and Valhi and Tremont's  directors on behalf
of Tremont's  stockholders  other than Valhi and its affiliates.  The complaints
allege,  among other things,  that the defendants have breached fiduciary duties
owed to Tremont's  stockholders other than Valhi and its affiliates with respect
to the Proposal.  Each of the complaints seeks class certification and to enjoin
the consummation of the Proposal and recover  attorneys' fees and expenses.  The
complaints also seek an award of damages if the Proposal is consummated. None of
the defendants has yet responded to the lawsuits.

         There is no assurance that any  transaction  will be consummated  under
the terms of the Proposal or otherwise.

         Depending  upon  their   evaluation  of  the  Company's   business  and
prospects,  and  upon  future  developments  (including,  but  not  limited  to,
performance of the Shares in the market, availability of funds, alternative uses
of funds, the Reporting Persons' tax planning objectives and money, stock market
and general economic conditions), any of the Reporting Persons or other entities
or persons  that may be deemed to be  affiliated  with  Contran may from time to
time  purchase  Shares,  and any of the Reporting  Persons or other  entities or
persons that may be deemed to be  affiliated  with Contran may from time to time
dispose  of all or a portion  of the Shares  held by such  entity or person,  or
cease buying or selling Shares.  Any such  additional  purchases or sales of the
Shares may be in open market or privately negotiated transactions or otherwise.

         As described under Item 2, Harold C. Simmons,  through Contran,  may be
deemed to control the Company.

         The  information  included in Item 6 of this Statement is  incorporated
herein by reference.

         The Reporting Persons understand that prior purchases of Shares by each
of the  persons  named in  Schedule B to this  Statement  (other  than Harold C.
Simmons) were made for the purpose of each such person's personal investment.

         Certain of the persons  named in Schedule B to this  Statement,  namely
David B. Garten, Robert D. Hardy, J. Landis Martin, Thomas P. Stafford, Glenn R.
Simmons,  Harold C. Simmons and Steven L. Watson,  are  directors or officers of
the Company and may acquire  Shares from time to time  pursuant to benefit plans
that the Company sponsors or other compensation arrangements with the Company.

         Except as described in this Item 4, none of the Reporting  Persons nor,
to the best  knowledge of such persons,  any other person named in Schedule B to
this Statement has  formulated  any plans or proposals  which relate to or would
result in any matter  required to be  disclosed  in response to  paragraphs  (a)
through (j) of Item 4 of Schedule 13D.

Item 5.  Interest in Securities of the Issuer.

         Item 5 is amended as follows:

         (a) Valhi, Tremont, Harold C. Simmons' spouse and Harold C. Simmons are
the direct beneficial owners of 30,135,390, 10,215,541, 69,475 and 5,000 Shares,
respectively. In addition, Harold C. Simmons holds stock options exercisable for
10,000 Shares, 8,000 of which stock options vest within 60 days of the filing of
this Statement.

         By  virtue  of  the  relationships  described  under  Item  2  of  this
Statement:

                  (1) Tremont, TGI and TRE Holdings may each be deemed to be the
         beneficial owner of the 10,215,541 Shares  (approximately  21.0% of the
         Outstanding Shares) directly held by Tremont;

                  (2) Valhi,  VGI,  National,  NOA, Dixie  Holding,  Dixie Rice,
         Southwest,  Contran,  the CMRT and the Foundation may each be deemed to
         be the beneficial owner of the 40,350,931 Shares  (approximately  82.8%
         of the Outstanding Shares) directly held by Valhi and Tremont; and

                  (3) Harold C. Simmons may be deemed to be the beneficial owner
         of the  40,435,406  Shares  (approximately  82.9%  of  the  Outstanding
         Shares)  directly  held by Valhi,  Tremont,  Mr.  Simmons'  spouse  and
         himself and including the 10,000 Shares that Mr. Simmons can acquire by
         exercise  of stock  options  (8,000 of which  stock  options  will vest
         within 60 days of the filing of this Statement).

         Mr. Simmons disclaims  beneficial  ownership of all Shares,  except the
5,000 Shares that he holds  directly and the 10,000 Shares that Mr.  Simmons can
acquire by exercise of stock options,  8,000 of which vest within 60 days of the
filing of this Statement.

         The Reporting Persons  understand,  based on ownership filings with the
Securities  and  Exchange  Commission  (the  "Commission")  or upon  information
provided  by the  persons  listed on  Schedule  B to this  Statement,  that such
persons may be deemed to own personally and beneficially the Shares as indicated
on Schedule C to this Statement.

         (b) By virtue of the relationships described in Item 2:

                  (1) Tremont,  TGI and TRE Holdings may each be deemed to share
         the power to vote and direct the  disposition of the 10,215,541  Shares
         that Tremont directly holds;

                  (2) Valhi,  VGI,  National,  NOA, Dixie  Holding,  Dixie Rice,
         Southwest,  Contran,  the CMRT and the Foundation may each be deemed to
         share the power to vote and direct the  disposition  of the  40,350,931
         Shares that Valhi and Tremont directly hold;

                  (3)  Harold  C.  Simmmons  may be deemed to share the power to
         vote and direct the  disposition of the  40,420,406  Shares that Valhi,
         Tremont and Mr. Simmons' spouse directly hold; and

                  (4) Harold C. Simmmons may be deemed to have the sole power to
         vote and  direct  the  disposition  of the 5,000  Shares  that he holds
         directly  and the 10,000  shares  that he can  acquire  pursuant to the
         exercise  of stock  options  (8,000 of which  stock  options  will vest
         within 60 days of the filing of this Statement).

         (d) Each of Valhi,  Tremont,  Harold C.  Simmons'  spouse and Harold C.
Simmons  has the  right to  receive  and the  power to  direct  the  receipt  of
dividends  from,  and proceeds  from the sale of, the Shares that such entity or
person directly holds.

Item 6.  Contracts, Arrangements, Understandings or Relationships With Respect
         to Securities of the Issuer.

         Item 6 is amended as follows:

         Valhi is a party to a Credit  Agreement (the "Valhi Credit  Facility"),
as amended,  with Comerica Bank, PNB Financial Bank, Texas Capital Bank and U.S.
Bank National Association (collectively,  the "Banks"). The Banks have committed
to loan to Valhi under the Valhi  Credit  Facility up to an  aggregate  of $72.5
million.  The  maximum  amount that Valhi could  borrow  under the Valhi  Credit
Facility could be increased to a maximum of $100 million, if and when additional
participating  banks  committed  to loan  additional  amounts to Valhi under the
Valhi  Credit  Facility.  The maturity  date for the Valhi  Credit  Agreement is
November 1, 2002.

         Borrowings  under the Valhi Credit  Facility bear interest (i) for base
rate borrowings, at the greater of the rate announced publicly from time to time
by U.S.  Bank as its prime rate or 0.50% over the federal funds rate or (ii) for
eurodollar  borrowings,  at a rate of 1.5% over the relevant rate  (adjusted for
statutory reserve requirements for eurodollar  liabilities) at which deposits in
U.S.  dollars  are  offered  to  U.S.  Bank's  London  office  in the  interbank
eurodollar  market (the one,  two,  three or six month rate at Valhi's  option).
Valhi's  obligations  under the Valhi  Credit  Facility  are  collateralized  by
certain Shares. As of August 2, 2002, Valhi had borrowed $35.0 million under the
Valhi  Credit  Facility,  approximately  $1.1  million of letters of credit were
outstanding  under the Valhi Credit  Facility  and Valhi had pledged  29,974,610
Shares (61.5% of the Outstanding  Shares) under the Valhi Credit  Facility.  The
aggregate  amount that Valhi could  borrow  under the Valhi  Credit  Facility is
limited  to  one-third  of the fair  market  value of the  pledged  Shares.  The
foregoing  summary of the Valhi Credit  Facility is qualified in its entirety by
reference to Exhibits 4 through 10 to this Statement.

         The  information  included  in  Item  4 of  this  Statement  is  hereby
incorporated herein by reference.

         Other than as set forth above, none of the Reporting Persons or, to the
best knowledge of such persons, any person named in Schedule B to this Statement
has  any  contract,   arrangement,   understanding  or  relationship  (legal  or
otherwise) with any person with respect to securities of the Company, including,
but not limited to,  transfer or voting of any such  securities,  finder's fees,
joint  ventures,  loans or option  arrangements,  puts or calls,  guarantees  of
profits, division of profits or losses, or the giving or withholding of proxies.

Item 7.  Material to be Filed as Exhibits.

         Item 7 is amended and restated as follows:

Exhibit  1        Letter dated July 26, 2002 from Valhi,  Inc. to the board of
                  directors of Tremont Corporation (incorporated by reference to
                  Exhibit 99.1 to the Current Report on Form 8-K of Valhi,  Inc.
                  the date of event of which is July 26, 2002).

Exhibit  2        Press   Release   of  Valhi  Inc.   dated  July  26,   2002
                  (incorporated  by  reference  to Exhibit  99.2 to the  Current
                  Report on Form 8-K of Valhi,  Inc.  the date of event of which
                  is July 26, 2002).

Exhibit  3        Press  Release of Tremont  Corporation  dated July 29,  2002
                  (incorporated  by reference to Exhibit 10 to Amendment  No. 20
                  to  the  Schedule  13D  filed  on  August  2,  2002  with  the
                  Securities  and Exchange  Commission  by Tremont  Group,  Inc,
                  Tremont Holdings, LLC, NL Industries, Inc., Valhi, Inc., Valhi
                  Group,  Inc.,  National City Lines,  Inc.,  NOA,  Inc.,  Dixie
                  Holding Company,  Dixie Rice Agricultural  Corporation,  Inc.,
                  Southwest Louisiana Land Company,  Inc., Contran  Corporation,
                  the Harold  Simmons  Foundation,  Inc.,  The  Combined  Master
                  Retirement  Trust and Harold C.  Simmons  with  respect to the
                  common   stock,   par  value  $1.00  per  share,   of  Tremont
                  Corporation).

Exhibit  4        Credit  Agreement  dated as of November 6, 1998 among Valhi,
                  Inc., the financial  institutions from time to time that are a
                  party  thereto (the "Banks") and Societe  Generale,  Southwest
                  Agency, as the administrative agent, issuing bank and arranger
                  (incorporated by reference to Exhibit 1 to Amendment No. 59 to
                  this Statement).

Exhibit  5        First Amendment Agreement dated as of November 5, 1999 among
                  Valhi, Inc., the Banks and Societe Generale, Southwest Agency,
                  as the  administrative  agent of the  banks  (incorporated  by
                  reference to Exhibit 2 to Amendment No. 60 to this Statement).

Exhibit  6        Second  Amendment  Agreement  dated as of  November  3, 2000
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association  as the  administrative  agent,  issuing  bank and
                  arranger  (incorporated by reference to Exhibit 3 to Amendment
                  No. 15 to the  Schedule 13D filed on October 24, 2000 with the
                  Securities and Exchange  Commission by Tremont Holdings,  LLC,
                  NL Industries,  Inc., Valhi, Inc., Valhi Group, Inc., National
                  City Lines, Inc., NOA, Inc., Dixie Holding Company, Dixie Rice
                  Agricultural  Corporation,   Inc.,  Southwest  Louisiana  Land
                  Company,   Inc.,  Contran  Corporation,   the  Harold  Simmons
                  Foundation,  Inc., The Combined  Master  Retirement  Trust and
                  Harold C. Simmons with respect to the common stock,  par value
                  $1.00 per share, of Tremont Corporation).

Exhibit  7        Form of  Accession  Agreement  dated as of  December 1, 2000
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association, as the administrative agent of the banks, and the
                  related  promissory note in the original  principal  amount of
                  $5.0  million  payable  to the  order  of Texas  Capital  Bank
                  (incorporated by reference to Exhibit 4 to Amendment No. 63 to
                  this Statement).

Exhibit  8        Third Amendment Agreement dated as of November 2, 2001 among
                  Valhi,  Inc., the Banks and U.S. Bank National  Association as
                  the   administrative   agent,   issuing   bank  and   arranger
                  (incorporated by reference to Exhibit 5 to Amendment No. 65 to
                  this Statement).

Exhibit  9        Form of  Accession  Agreement  dated as of January  15, 2002
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association, as the administrative agent of the banks, and the
                  related  promissory note in the original  principal  amount of
                  $15.0  million  payable  to the  order of PNB  Financial  Bank
                  (incorporated by reference to Exhibit 6 to Amendment No. 65 to
                  this Statement).

Exhibit  10*      Form of Accession  Agreement dated as of February 15, 2002
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association, as the administrative agent of the banks, and the
                  related  promissory note in the original  principal  amount of
                  $7.5 million payable to the order of Texas Capital Bank.

----------

*        Filed herewith.







                                    Signature

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this Statement is true,  complete and
correct.

Date:  August 5, 2002




                                                          /s/ Harold C. Simmons
                                                          ----------------------
                                                          Harold C. Simmons
                                                          Signing in the
                                                          capacities listed on
                                                          Schedule "A" attached
                                                          hereto and
                                                          incorporated herein by
                                                          reference.





                                    Signature

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this Statement is true,  complete and
correct.

Date:  August 5, 2002




                                                          /s/ J. Landis Martin
                                                          ----------------------
                                                          J. Landis Martin
                                                          Signing in the
                                                          capacity listed on
                                                          Schedule "A" attached
                                                          hereto and
                                                          incorporated herein by
                                                          reference.





                                    Signature

         After reasonable  inquiry and to the best of my knowledge and belief, I
certify that the information  set forth in this Statement is true,  complete and
correct.

Date:  August 5, 2002





                                                           /s/ Steven L. Watson
                                                          ---------------------
                                                          Steven L. Watson
                                                          Signing in the
                                                          capacities listed on
                                                          Schedule "A" attached
                                                          hereto and
                                                          incorporated herein by
                                                          reference.





                                   SCHEDULE A


HAROLD C. SIMMONS, in his individual capacity and as trustee of THE COMBINED
MASTER RETIREMENT TRUST.


J. LANDIS MARTIN, as president of:

TREMONT CORPORATION
TREMONT HOLDINGS, LLC


STEVEN L. WATSON, as president or vice president of each of:

CONTRAN CORPORATION
DIXIE HOLDING COMPANY
DIXIE RICE AGRICULTURAL CORPORATION, INC.
HAROLD SIMMONS FOUNDATION, INC.
NATIONAL CITY LINES, INC.
NOA, INC.
SOUTHWEST LOUISIANA LAND COMPANY, INC.
TREMONT GROUP, INC.
VALHI GROUP, INC.
VALHI, INC.





                                   Schedule B

         Schedule B is hereby amended and restated as follows:

         The  names  of  the  directors   and  executive   officers  of  Contran
Corporation  ("Contran"),  Dixie Holding Company ("Dixie  Holding"),  Dixie Rice
Agricultural  Corporation,  Inc. ("Dixie Rice"), the Harold Simmons  Foundation,
Inc. (the  "Foundation"),  National  City Lines,  Inc.  ("National"),  NOA, Inc.
("NOA"),   Southwest  Louisiana  Land  Company,  Inc.   ("Southwest"),   Tremont
Corporation ("Tremont"),  Tremont Group, Inc. ("TGI"), Valhi Group, Inc. ("VGI")
and Valhi, Inc. ("Valhi"), and their present principal occupations are set forth
below.  Except as  otherwise  indicated,  each such  person is a citizen  of the
United  States of America and the  business  address of each such person is 5430
LBJ Freeway, Suite 1700, Dallas, Texas 75240.



            Name                                            Present Principal Occupation
-----------------------------                             ---------------------------------
                                                       
Eugene K. Anderson                                        Vice president of Contran, Dixie Holding, Dixie Rice, National, NOA,
                                                          Southwest, TGI, VGI and Valhi; and treasurer of the Foundation.

Thomas E. Barry (1)                                       Vice president for executive affairs at Southern  Methodist
                                                          University  and  professor of marketing in the Edwin L. Cox
                                                          School of Business at Southern Methodist University;  and a
                                                          director of Valhi.

Norman S. Edelcup (2)                                     Senior  vice  president  business  development  of  Florida
                                                          Savings  Bancorp;  director  of Valhi;  and  trustee of the
                                                          Baron Funds, a mutual fund group.

Lisa Simmons Epstein                                      Director and president of the Foundation.

David B. Garten (3)                                       Vice  president,   general  counsel  and  secretary  of  NL
                                                          Industries,  Inc. (the  "Company");  and vice president and
                                                          secretary of Tremont Holdings, LLC ("TRE Holdings").

Edward J. Hardin (4)                                      Partner  of the law  firm of  Rogers &  Hardin  LLP;  and a
                                                          director of Valhi.

Robert D. Hardy (3)                                       Vice  president,  chief financial  officer,  controller and
                                                          treasurer  of  the   Company;   and  vice   president   and
                                                          controller of TRE Holdings.

J. Mark Hollingsworth                                     Vice  president  and  general  counsel  of  Contran,  Dixie
                                                          Holding,  Dixie Rice,  National,  NOA, Southwest,  TGI, VGI
                                                          and  Valhi;  general  counsel  of  the  Foundation,   CompX
                                                          International  Inc., a manufacturer  of ergonomic  computer
                                                          support   systems,   precision   ball  bearing  slides  and
                                                          security  products that is affiliated with Valhi ("CompX"),
                                                          and The Combined  Master  Retirement  Trust,  a trust Valhi
                                                          established to permit the  collective  investment by master
                                                          trusts  that  maintain  the  assets  of  certain   employee
                                                          benefit  plans  Valhi  and  related  companies  adopt  (the
                                                          "CMRT");   and   acting   general   counsel   of   Keystone
                                                          Consolidated Industries, Inc. ("Keystone"),  a manufacturer
                                                          of steel rod,  wire and wire  products  that is  affiliated
                                                          with Contran.

Keith A. Johnson                                          Controller of the Foundation.

William J. Lindquist                                      Director and senior vice president of Contran, Dixie Holding,
                                                          National, NOA, TGI and VGI; and senior vice president of Dixie
                                                          Rice, Southwest and Valhi.

A. Andrew R. Louis                                        Secretary of Contran,  CompX,  Dixie  Holding,  Dixie Rice,
                                                          National, NOA, Southwest, TGI, VGI and Valhi.

Kelly D. Luttmer                                          Tax director of Contran, CompX, Dixie Holding, Dixie Rice,
                                                          National, NOA, Southwest, TGI, VGI and Valhi.

J. Landis Martin (5)                                      President,  chief  executive  officer and a director of the
                                                          Company; president of TRE Holdings;  chairman of the board,
                                                          president  and  chief  executive  officer  of  Tremont  and
                                                          Titanium Metals Corporation,  a producer of titanium metals
                                                          products that is affiliated with Tremont ("TIMET").

Andrew McCollam, Jr. (6)                                  President  and a director of  Southwest;  director of Dixie
                                                          Rice; and a private investor.

W. Hayden McIlroy (7)                                     Private investor  primarily in real estate;  and a director
                                                          of Tremont,  Med Images, a medical information company, and
                                                          Cadco  Systems,  Inc., a  manufacturer  of emergency  alert
                                                          systems.

Harold M. Mire (8)                                        Vice president of Dixie Rice and Southwest.

Robert E. Musgraves (5)                                   Executive vice president and general counsel of TIMET; and
                                                          vice president, general counsel and secretary of Tremont.

Bobby D. O'Brien                                          Vice president, treasurer and director of Dixie
                                                          Holding, National, NOA and VGI; vice president and
                                                          treasurer of Contran, Dixie Rice, TGI and Valhi; and vice
                                                          president of Southwest.

Glenn R. Simmons                                          Vice chairman of the board of Contran, Dixie Holding, National,
                                                          NOA, TGI, VGI and Valhi; chairman of the board of CompX and
                                                          Keystone; director and executive vice president of Southwest
                                                          and Dixie Rice; and a director of the Company, Tremont and
                                                          TIMET.

Harold C. Simmons                                         Chairman of the board and chief executive officer of
                                                          Contran, Dixie Holding, Dixie Rice, the Foundation,
                                                          National, NOA, Southwest, TGI, VGI and Valhi; chairman of
                                                          the board of the Company; director of Tremont; and trustee
                                                          and member of the trust investment committee of the CMRT.

Richard A. Smith (8)                                      Vice president of Dixie Rice.

Thomas P. Stafford (9)                                    Co-founder   of  Stafford,   Burke  and  Hecker,   Inc.,  a
                                                          consulting  company;  director of the Company,  Tremont and
                                                          TIMET;  and a director of CMI Corporation and The Wackenhut
                                                          Corp.

Gregory M. Swalwell                                       Vice president and controller of Contran, Dixie Holding,
                                                          National, NOA, TGI, VGI and Valhi; and vice president of
                                                          Dixie Rice and Southwest.

J. Walter Tucker, Jr. (10)                                President,  treasurer  and a director  of Tucker & Branham,
                                                          Inc.,  a  mortgage  banking,   insurance  and  real  estate
                                                          company;   vice  chairman  of  the  board  of  Keystone;  a
                                                          director  of Valhi;  and a member  of the trust  investment
                                                          committee of the CMRT.

Mark A. Wallace (5)                                       Executive  vice  president,  chief  financial  officer  and
                                                          treasurer of TIMET;  and vice  president,  chief  financial
                                                          officer and treasurer of Tremont.

Steven L. Watson                                          Director and president of Contran, Dixie Holding, Dixie
                                                          Rice, National, NOA, TGI, VGI and Valhi; director and executive
                                                          vice president of Southwest; director, vice president and
                                                          secretary of the Foundation; and a director of the
                                                          Company, Tremont and TIMET.

Terry N. Worrell (11)                                     Associated  with Worrell  Investments,  Inc., a real estate
                                                          investment  company;  and a director of Tremont and Regency
                                                          Centers, a publicly traded  developer/operator  of shopping
                                                          centers.

----------

(1)      The  principal  business  address for Dr.  Barry is Southern  Methodist
         University, Perkins Administration Bldg. #224, Dallas,
         Texas   75275.

(2)      The principal  business address for Mr. Edelcup is 8181 Southwest 117th
         Street, Pinecrest, Florida 33156.

(3)      The  principal  business  address for  Messrs.  Garten and Hardy is Two
         Greenspoint Plaza, 16825 Northchase Drive, Suite 1200,  Houston,  Texas
         77060.

(4)      The principal  business address for Mr. Hardin is 229 Peachtree Street,
         N.E., Suite 2700, Atlanta, Georgia 30303.

(5)      The  principal  business  address for  Messrs.  Martin,  Musgraves  and
         Wallace is 1999 Broadway, Suite 4300, Denver, Colorado 80202.

(6)      The principal  business  address for Mr.  McCollam is 402 Canal Street,
         Houma, Louisiana 70360.

(7)      The  principal  business  address  for Mr.  McIlroy is 6116 N.  Central
         Expressway, Dallas, Texas 75206.

(8)      The  principal  business  address  for  Messrs.  Mire and  Smith is 600
         Pasquiere Street, Gueydan, Louisiana 70542-0010.

(9)      The  principal  business  address  for Gen.  Stafford  is 1006  Cameron
         Street, Alexandria, Virginia 22314.

(10)     The  principal  business  address  for  Mr.  Tucker  is 400 E.  Central
         Boulevard, Orlando, Florida 32801.

(11)     The principal business address for Mr. Worrell is 6909 Vassar,  Dallas,
         Texas 75205.






                                   SCHEDULE C

         Schedule C is hereby amended and restated as follows:

         Based upon ownership  filings with the  Commission or upon  information
provided by the persons listed on Schedule B to this Statement, such persons may
be deemed to own personally and beneficially Shares, as outlined below:



                                                           Shares                  Options
                       Name                                 Held                   Held (1)                Total
            --------------------------                  -----------               -----------           -----------
                                                                                                
Eugene K. Anderson                                              -0-                     -0-                  -0-

Thomas E. Barry                                                 -0-                     -0-                  -0-

Norman S. Edelcup                                               -0-                     -0-                  -0-

Lisa Simmons Epstein                                            -0-                     -0-                  -0-

David B. Garten (2)                                          22,335                 138,000              160,335

Edward J. Hardin                                                -0-                     -0-                  -0-

Robert D. Hardy (3)                                          16,344                  73,000               89,344

J. Mark Hollingsworth (4)                                       500                     -0-                  500

Keith A. Johnson                                                -0-                     -0-                  -0-

William J. Lindquist                                            -0-                     -0-                  -0-

A. Andrew R. Louis                                              -0-                     -0-                  -0-

Kelly D. Luttmer                                                -0-                     -0-                  -0-

J. Landis Martin                                             10,500                 330,400              340,900

Andrew McCollam, Jr.                                            -0-                     -0-                  -0-

W. Hayden McIlroy                                               -0-                     -0-                  -0-

Harold M. Mire                                                  -0-                     -0-                  -0-

Robert E. Musgraves                                             -0-                     -0-                  -0-

Bobby D. O'Brien                                                -0-                     -0-                  -0-

Glenn R. Simmons                                              3,000                   8,000               11,000

Harold C. Simmons (5)                                         5,000                   8,000               13,000

Richard A. Smith                                                -0-                     -0-                  -0-

Thomas P. Stafford                                            3,000                   4,000                7,000

Gregory M. Swalwell                                             -0-                     -0-                  -0-

J. Walter Tucker, Jr.                                           -0-                     -0-                  -0-

Mark A. Wallace                                                 -0-                     -0-                  -0-

Steven L. Watson                                              6,000                   2,000                8,000

Terry N. Worrell                                                -0-                     -0-                  -0-

----------

(1)      Represents  Shares issuable  pursuant to the exercise within 60 days of
         the date of this Statement of stock options.

(2)      Comprises  22,335  Shares  held by Mr.  Garten  and his  wife as  joint
         tenants.

(3)      Includes 16,344 shares held by Mr. Hardy and his wife as joint tenants.

(4)      Comprises  500  Shares  Mr.   Hollingsworth  holds  in  his  individual
         retirement account.

(5)      Mr. Simmons may be deemed to possess indirect  beneficial  ownership of
         the Shares as  described  in Item 5 of this  Statement.  Item 5 of this
         Statement  reports all Shares issuable  pursuant to the exercise of Mr.
         Simmons'  stock options,  regardless of vesting,  while this Schedule C
         reports only those Shares that Mr.  Simmons can receive  within 60 days
         of the date of this Statement  upon exercise of his stock options.  Mr.
         Simmons  disclaims  beneficial  ownership of all Shares  except for the
         5,000  Shares  that he holds  directly  and the 10,000  Shares that Mr.
         Simmons can acquire by exercise of stock  options  (8,000 of which vest
         within 60 days of the date of the Statement).






                                  EXHIBIT INDEX


Exhibit 1         Letter dated July 26, 2002 from Valhi,  Inc. to the board of
                  directors of Tremont Corporation (incorporated by reference to
                  Exhibit 99.1 to the Current Report on Form 8-K of Valhi,  Inc.
                  the date of event of which is July 26, 2002).

Exhibit 2         Press   Release   of  Valhi  Inc.   dated  July  26,   2002
                  (incorporated  by  reference  to Exhibit  99.2 to the  Current
                  Report on Form 8-K of Valhi,  Inc.  the date of event of which
                  is July 26, 2002).

Exhibit 3         Press  Release of Tremont  Corporation  dated July 29,  2002
                  (incorporated  by reference to Exhibit 10 to Amendment  No. 20
                  to  the  Schedule  13D  filed  on  August  2,  2002  with  the
                  Securities  and Exchange  Commission  by Tremont  Group,  Inc,
                  Tremont Holdings, LLC, NL Industries, Inc., Valhi, Inc., Valhi
                  Group,  Inc.,  National City Lines,  Inc.,  NOA,  Inc.,  Dixie
                  Holding Company,  Dixie Rice Agricultural  Corporation,  Inc.,
                  Southwest Louisiana Land Company,  Inc., Contran  Corporation,
                  the Harold  Simmons  Foundation,  Inc.,  The  Combined  Master
                  Retirement  Trust and Harold C.  Simmons  with  respect to the
                  common   stock,   par  value  $1.00  per  share,   of  Tremont
                  Corporation).

Exhibit 4         Credit  Agreement  dated as of November 6, 1998 among Valhi,
                  Inc., the financial  institutions from time to time that are a
                  party  thereto (the "Banks") and Societe  Generale,  Southwest
                  Agency, as the administrative agent, issuing bank and arranger
                  (incorporated by reference to Exhibit 1 to Amendment No. 59 to
                  this Statement).

Exhibit 5         First Amendment Agreement dated as of November 5, 1999 among
                  Valhi, Inc., the Banks and Societe Generale, Southwest Agency,
                  as the  administrative  agent of the  banks  (incorporated  by
                  reference to Exhibit 2 to Amendment No. 60 to this Statement).

Exhibit 6         Second  Amendment  Agreement  dated as of  November  3, 2000
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association  as the  administrative  agent,  issuing  bank and
                  arranger  (incorporated by reference to Exhibit 3 to Amendment
                  No. 15 to the  Schedule 13D filed on October 24, 2000 with the
                  Securities and Exchange  Commission by Tremont Holdings,  LLC,
                  NL Industries,  Inc., Valhi, Inc., Valhi Group, Inc., National
                  City Lines, Inc., NOA, Inc., Dixie Holding Company, Dixie Rice
                  Agricultural  Corporation,   Inc.,  Southwest  Louisiana  Land
                  Company,   Inc.,  Contran  Corporation,   the  Harold  Simmons
                  Foundation,  Inc., The Combined  Master  Retirement  Trust and
                  Harold C. Simmons with respect to the common stock,  par value
                  $1.00 per share, of Tremont Corporation).

Exhibit 7         Form of  Accession  Agreement  dated as of  December 1, 2000
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association, as the administrative agent of the banks, and the
                  related  promissory note in the original  principal  amount of
                  $5.0  million  payable  to the  order  of Texas  Capital  Bank
                  (incorporated by reference to Exhibit 4 to Amendment No. 63 to
                  this Statement).

Exhibit 8         Third Amendment Agreement dated as of November 2, 2001 among
                  Valhi,  Inc., the Banks and U.S. Bank National  Association as
                  the   administrative   agent,   issuing   bank  and   arranger
                  (incorporated by reference to Exhibit 5 to Amendment No. 65 to
                  this Statement).

Exhibit 9         Form of  Accession  Agreement  dated as of January  15, 2002
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association, as the administrative agent of the banks, and the
                  related  promissory note in the original  principal  amount of
                  $15.0  million  payable  to the  order of PNB  Financial  Bank
                  (incorporated by reference to Exhibit 6 to Amendment No. 65 to
                  this Statement).

Exhibit 10*       Form of Accession  Agreement dated as of February 15, 2002
                  among  Valhi,   Inc.,   the  Banks  and  U.S.   Bank  National
                  Association, as the administrative agent of the banks, and the
                  related  promissory note in the original  principal  amount of
                  $7.5 million payable to the order of Texas Capital Bank.

----------

*        Filed herewith.