VALHI INC /DE/
SC 13D/A, 2001-01-10
SUGAR & CONFECTIONERY PRODUCTS
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  Schedule 13D

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 17)*

                               TREMONT CORPORATION
                                (Name of Issuer)

                          Common Stock, $1.00 par value
                         (Title of Class of Securities)

                                   894745 20 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)

                                December 31, 2000
                      (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)



<PAGE>


CUSIP No.  894745 20 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)

                      OO

     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                                     5,141,421
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,141,421

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,141,421

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

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

                      80.0%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO




<PAGE>


CUSIP No.  894745 20 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)

                      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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      OO



<PAGE>


CUSIP No.  894745 20 7

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

                      NL Industries, 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

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


     6       CITIZENSHIP OR PLACE OF ORGANIZATION

                      New Jersey

                               7      SOLE VOTING POWER

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      CO



<PAGE>


CUSIP No.  894745 20 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                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      5,149,588

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

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

                      80.2%

    14       TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

                      EP



<PAGE>


CUSIP No.  894745 20 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

                                                            -0-
        NUMBER OF
          SHARES               8      SHARED VOTING POWER
       BENEFICIALLY
         OWNED BY                                     5,149,588
           EACH
        REPORTING              9      SOLE DISPOSITIVE POWER
          PERSON
           WITH                                             -0-

                               10     SHARED DISPOSITIVE POWER

                                                      5,149,588

    11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                      -0-

    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



<PAGE>


                                AMENDMENT NO. 17
                                 TO SCHEDULE 13D

         This amended  statement on Schedule 13D (this  "Statement")  relates to
the  common  stock,  par value  $1.00  per  share  (the  "Shares"),  of  Tremont
Corporation,  a Delaware 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(a) is hereby amended and restated, and Items 2(b), (c), (d), (e)
and (f) are amended, as follows.

         (a) This  Statement  is filed by (i) Tremont  Group,  Inc.  ("TGI") and
Tremont Holdings,  LLC ("TRE Holdings") as the holders of Shares, (ii) by virtue
of the direct and indirect  ownership of securities of TGI and TRE Holdings,  NL
Industries,  Inc ("NL"),  Valhi,  Inc.  ("Valhi"),  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 Harold Simmons  Foundation,  Inc. (the  "Foundation")  and the
Combined  Master  Retirement  Trust  (the  "CMRT")  and  (iii) by  virtue of his
positions  with Contran and certain of the other  entities (as described in this
Statement),  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.

         TGI and TRE Holdings are the holders of  approximately  80.0% and 0.1%,
respectively,  of the  6,424,658  Shares  outstanding  as of  December  31, 2000
according to  information  provided by the Company (the  "Outstanding  Shares").
Together,  TGI and TRE Holdings may be deemed to control the Company.  Valhi and
TRE  Holdings  are the direct  holders of 80.0% and 20.0%,  respectively  of the
outstanding  common stock of TGI.  Together Valhi and TRE Holdings may be deemed
to  control  TGI.  NL is the sole  member of TRE  Holdings  and may be deemed to
control  TRE  Holdings.  Valhi  and  the  Company  are  the  direct  holders  of
approximately 60.2% and 20.4%, respectively,  of the outstanding common stock of
NL and  together  may be deemed to  control  NL.  VGI,  National,  Contran,  the
Foundation, the Contran Deferred Compensation Trust No. 2 (the "CDCT No. 2") and
the CMRT are the  direct  holders of 81.7%,  9.5%,  1.7%,  0.5%,  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 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 either
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,  or
by Mr. Simmons directly.  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  0.5% 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
owed 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 NL 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 NL 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 NL and a director of
the Company.

         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,  except to the extent of his vested beneficial interest
in the Shares held by the CMRT.

         Harold C.  Simmons'  spouse is the  direct  owner  69,475  shares of NL
common stock and 77,000 shares of Valhi common stock.  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 principal  offices of TGI are located at Three Lincoln  Centre,
5430 LBJ Freeway,  Suite 1700, Dallas, Texas 75240-2697.  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.

         (c)      TGI is engaged in holding Shares.

         (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)  TGI is a  Delaware  corporation.  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.

         No change except for the addition of the following:

         The total  amount  of funds  Valhi  used to  acquire  the 5,000  Shares
purchased  by it on the open  market as  reported  in Item 5(c) was  $153,875.00
(including commissions). Such funds were provided by Valhi's cash on hand.

         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 except for the addition of the following:

         On November 30, 2000,  Valhi  purchased 5,000 Shares in the open market
in  order to  increase  its  equity  interest  in the  Company  and to  obtain a
sufficient number of Shares so that, if it were determined to be desirable,  the
Company and NL might become members of the same consolidated  federal income tax
group of which Valhi, VGI, National,  NOA, Dixie Holding,  Dixie Rice, Southwest
and Contran are members (the "Consolidated Tax Group"). On December 21, 2000, NL
contributed its 536,167 Shares to TRE Holdings,  and TRE Holdings  acquired such
Shares,  in order for TRE Holdings to contribute such Shares to TGI. On December
31, 2000,  Valhi and TRE Holdings  contributed  4,113,421 and 1,028,000  Shares,
respectively,  to TGI,  and TGI acquired  such Shares,  in order to form TGI and
allow NL, the Company, and TGI to become members of the Consolidated Tax Group.

         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
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 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  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 of this  Statement,  Harold C. Simmons may be
deemed to control the Company.

         The  Reporting  Persons  understand  that prior  purchases of Shares by
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.

         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.

         Items 5(a), (b), (c) and (d) are amended as follows.

         (a)  TGI and  TRE  Holdings  are the  beneficial  owners  of  5,141,421
(approximately  80.0%  of the  Outstanding  Shares)  and  8,167  of  the  Shares
(approximately 0.1% of the Outstanding Shares), respectively.

         By  virtue  of  the  relationships  described  under  Item  2  of  this
Statement,  TRE Holdings,  NL, Valhi, VGI, National,  NOA, Dixie Holding,  Dixie
Rice,  Southwest,  Contran,  the Foundation,  the CMRT and Harold C. Simmons may
each be deemed to be the beneficial owner of the 5,149,588 Shares (approximately
80.2% of the Outstanding Shares) that TGI and TRE Holdings hold.

         Mr. Simmons disclaims beneficial ownership of all Shares.

         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  beneficially the Shares as indicated on Schedule C
to this Statement.

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

                  (1) TGI may be deemed  to share  the power to vote and  direct
         the disposition of the Shares that TGI holds; and

                  (2)  TRE  Holdings,  NL,  Valhi,  VGI,  National,  NOA,  Dixie
         Holding, Dixie Rice, Southwest,  Contran, the Foundation,  the CMRT and
         Harold  C.  Simmons  may each be  deemed to share the power to vote and
         direct the disposition of the Shares that TGI and TRE Holdings hold.

         (c) On November  30,  2000,  Valhi  purchased  on the open market 5,000
Shares at $30.725 per share (exclusive of commissions). On December 21, 2000, NL
contributed 536,167 Shares to TRE Holdings in a private transaction. On December
31, 2000,  Valhi and TRE Holdings  contributed  4,133,421  Shares and  1,028,000
Shares, respectively, in a private transaction to TGI to form TGI. There were no
other  transactions  in the  Shares  by the  Reporting  Persons  since  the last
transaction  by the  Reporting  Persons  reported  in  Amendment  No. 16 to this
Schedule 13D.

         (d) Each of TGI and TRE Holdings has the right to receive and the power
to direct the receipt of  dividends  from,  and  proceeds  from the sale of, the
5,141,421 and 8,167 Shares, respectively, held by such entity.

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

         Item 6 is hereby amended as follows.

         TGI's certificate of incorporation  provides for certain redemption and
other  rights  of  the  holders  of  its  common  stock.  TGI's  certificate  of
incorporation  is attached as Exhibit 5 to this  amendment to this Statement and
incorporated herein by reference.  Pursuant to the certificate of incorporation,
each  holder of a share of TGI  common  stock (a "TGI  Share")  can cause TGI to
redeem  within 45 days such TGI Share for  1,000  Shares.  In  addition  to such
Shares,  the holder may be  entitled to receive  from,  or be required to pay to
TGI, as the case may be, the  difference  between  the fair market  value of the
redeemed TGI Share and the 1,000 Shares received upon  redemption,  all pursuant
to the  terms  of TGI's  certificate  of  incorporation.  In  addition,  the TGI
certificate of incorporation  provides that TGI shall have five directors.  Only
holders of at least 90% of the  outstanding  TGI Shares can amend the redemption
provisions  or the number of directors  provided for in the TGI  certificate  of
incorporation.

         Valhi and TRE Holdings have entered into a voting agreement dated as of
December 31, 2000 whereby  Valhi agrees to elect one director  designated by TRE
Holdings  to TGI's board of  directors  (the "TGI  Voting  Agreement").  The TGI
Voting  Agreement is attached as Exhibit 6 to this  amendment to this  Statement
and incorporated herein by reference.

         Valhi,  Contran and NL have entered into a Tax Sharing  Agreement dated
as of  January  1, 2001 (the "NL Tax  Sharing  Agreement").  The NL Tax  Sharing
Agreement  is  attached as Exhibit 7 to this  amendment  to this  Statement  and
incorporated  herein by reference.  The NL Tax Sharing Agreement provides for NL
and its subsidiaries to make payments to, or receive payments from, Valhi in the
amount they would have paid to or received from the Internal Revenue Service had
they not been  members of the  Consolidated  Tax  Group.  The  separate  company
provisions and payments are computed using the tax elections made by Contran. NL
and each  subsidiary  of NL that is a member  of the  Consolidated  Tax Group is
severally liable to Valhi for the federal income tax of NL or such NL subsidiary
for  all  periods  in  which  NL or  such  NL  subsidiary  is  included  in  the
Consolidated  Tax Group.  Valhi has agreed to indemnify NL and its  subsidiaries
for any  liability for income taxes of the  Consolidated  Tax Group in excess of
NL's and its subsidiaries' tax liability  computed in accordance with the NL Tax
Sharing Agreement.  NL has agreed to indemnify Valhi and its subsidiaries (other
than NL and its  subsidiaries)  for any liability for income taxes of NL and its
subsidiaries computed in accordance with the NL Tax Sharing Agreement.

         Valhi,  Contran  and  the  Company  have  entered  into  a Tax  Sharing
Agreement  dated as of January 1, 2001 (the "Tremont Tax Sharing  Agreement" and
collectively with the NL Tax Sharing Agreement,  the "Tax Sharing  Agreements").
The Tremont Tax Sharing  Agreement is attached as Exhibit 8 to this amendment to
this  Statement and  incorporated  herein by reference.  The Tremont Tax Sharing
Agreement  provides for the Company and its subsidiaries to make payments to, or
receive  payments from,  Valhi in the amount they would have paid to or received
from the Internal  Revenue Service had they not been members of the Consolidated
Tax Group. The separate  company  provisions and payments are computed using the
tax elections  made by Contran.  The Company and each  subsidiary of the Company
that is a member of the  Consolidated Tax Group is severally liable to Valhi for
the federal income tax of the Company or such Company subsidiary for all periods
in which the Company or such Company  subsidiary is included in the Consolidated
Tax Group.  Valhi has agreed to indemnify the Company and its  subsidiaries  for
any  liability for income taxes of the  Consolidated  Tax Group in excess of the
Company's and its  subsidiaries'  tax liability  computed in accordance with the
Tremont Tax Sharing Agreement. The Company has agreed to indemnify Valhi and its
subsidiaries (other than the Company and its subsidiaries) for any liability for
income taxes of the Company and its subsidiaries computed in accordance with the
Tremont Tax Sharing Agreement.

         Except for the provisions and agreements  described in this item,  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 hereby amended and restated as follows.

Exhibit 1         Credit  Agreement  dated as of November  6, 1998 among  Valhi,
                  Inc., the financial  institutions from time to time that are a
                  party thereto and Societe  Generale,  Southwest Agency, as the
                  administrative agent, issuing bank and arranger  (incorporated
                  by reference to Exhibit 1 to Amendment  No. 59 to the Schedule
                  13D  filed  on  November  23,  1999  with the  Securities  and
                  Exchange Commission by Tremont Corporation,  Valmont Insurance
                  Company,  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  Combined  Master
                  Retirement  Trust,  the Harold  Simmons  Foundation,  Inc. and
                  Harold C. Simmons with respect to the common stock,  par value
                  $0.125 per share, of NL Industries, Inc.).

Exhibit 2         First  Amendment  Agreement dated as of November 5, 1999 among
                  Valhi, Inc., the financial institutions from time to time that
                  are a party thereto and Societe Generale, Southwest Agency, as
                  the   administrative   agent,   issuing   bank  and   arranger
                  (incorporated by reference to Exhibit 2 to Amendment No. 60 to
                  the   Schedule  13D  filed  on  December  14,  1999  with  the
                  Securities  and Exchange  Commission  by Tremont  Corporation,
                  Valmont Insurance  Company,  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 Combined Master
                  Retirement  Trust,  the Harold  Simmons  Foundation,  Inc. and
                  Harold C. Simmons with respect to the common stock,  par value
                  $0.125 per share, of NL Industries, Inc.).

Exhibit 3         Second Amendment  Agreement dated as of November 3, 2000 among
                  Valhi, Inc., the financial institutions from time to time that
                  are a party thereto 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  this
                  Statement).

Exhibit 4         Stock Purchase  Agreement dated as of November 7, 2000 between
                  Valhi, Inc. and J. Landis Martin (incorporated by reference to
                  Exhibit 4 to Amendment No. 16 to this Statement).

Exhibit 5*        Certificate of Incorporation of Tremont Group, Inc.

Exhibit 6*        Voting  Agreement dated as of December 31, 2000 between Valhi,
                  Inc. and Tremont Holdings, LLC.

Exhibit 7*        Tax  Sharing  Purchase  Agreement  dated as of January 1, 2001
                  among Valhi, Inc., Contran Corporation and NL Industries, Inc.

Exhibit 8*        Tax  Sharing  Purchase  Agreement  dated as of January 1, 2001
                  among   Valhi,   Inc.,   Contran   Corporation   and   Tremont
                  Corporation.

----------
*        Filed herewith.


<PAGE>


                                    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:  January 10, 2001




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


<PAGE>


                                    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:  January 10, 2001




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


<PAGE>


                                    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:  January 10, 2001





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


<PAGE>


                                   SCHEDULE A


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


J. LANDIS MARTIN, as president of each of:

NL INDUSTRIES, INC.
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.


<PAGE>


                                   Schedule B


         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"), NL Industries,
Inc.  ("NL"),  NOA,  Inc.  ("NOA"),   Southwest  Louisiana  Land  Company,  Inc.
("Southwest"), 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
-----------------------------            ---------------------------------

Susan E. Alderton (1)               Vice   president,    treasurer   and   chief
                                    financial   officer   of  NL   and   Tremont
                                    Holdings,   LLC  ("TRE  Holdings");   and  a
                                    director   of   Tremont   Corporation   (the
                                    "Company").

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

Thomas E. Barry (2)                 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 (3)               Private  investor;  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 (4)                 Vice   president,    general   counsel   and
                                    secretary  of NL;  and  vice  president  and
                                    secretary of TRE Holdings.

Edward J. Hardin (5)                Partner  of the law firm of  Rogers & Hardin
                                    LLP; and a director of Valhi.

Robert D. Hardy (4)                 Vice  president and controller of NL and TRE
                                    Holdings.

J. Mark Hollingsworth               Vice   president  and  general   counsel  of
                                    Contran,  Dixie  Holding,  Dixie Rice,  NOA,
                                    National, Southwest, TGI, VGI and Valhi; and
                                    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").

Keith A. Johnson                    Controller of the Foundation.

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

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

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

J. Landis Martin (6)                President,  chief  executive  officer  and a
                                    director of NL;  president of TRE  Holdings;
                                    chairman of the board,  president  and chief
                                    executive   officer  of  the   Company   and
                                    Titanium Metals  Corporation,  a producer of
                                    titanium  metals products that is affiliated
                                    with the Company ("TIMET").

Andrew McCollam, Jr. (7)            President   and  a  director  of  Southwest;
                                    director  of  Dixie  Rice;   and  a  private
                                    investor.

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

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

Kenneth R. Peak (9)                 President,   chief  executive   officer  and
                                    chairman of the board of Contango  Oil & Gas
                                    Company,  a publicly traded  independent oil
                                    and gas exploration and production  company;
                                    and a director of NL.

Glenn R. Simmons                    Vice chairman of the board of Contran, Dixie
                                    Holding, NOA, National,  TGI, VGI and Valhi;
                                    chairman of the board of CompX and  Keystone
                                    Consolidated Industries,  Inc. ("Keystone"),
                                    a  manufacturer  of steel rod, wire and wire
                                    products  that is  affiliated  with Contran;
                                    director  and  executive  vice  president of
                                    Southwest and Dixie Rice;  and a director of
                                    NL, TIMET and the Company.

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

Richard A. Smith (8)                Director and president of Dixie Rice.

Thomas P. Stafford (10)             Co-founder  of  Stafford,  Burke and Hecker,
                                    Inc., a consulting company;  director of NL,
                                    TIMET and the  Company;  and a  director  of
                                    Allied-Signal,  Inc.,  CMI  Corporation  and
                                    Seagate Technologies, Inc.

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

J. Walter Tucker, Jr. (11)          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.

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

Lawrence A. Wigdor (4)              Director and executive vice president of NL.

----------

(1)      The principal business address for Ms. Alderton is 70 East 55th Street,
         8th Floor, New York, New York 10022.

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

(3)      The principal  business  address for Mr. Edelcup is 244 Atlantic Isles,
         Sunny Isles Beach, Florida 33160.

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

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

(6)      The principal  business address for Mr. Martin is 1999 Broadway,  Suite
         4300, Denver, Colorado 80202.

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

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

(9)      The principal  business  address for Mr. Peak is 2702 Albans,  Houston,
         Texas 77005.

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

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


<PAGE>


                                   SCHEDULE C


         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:

<TABLE>
<CAPTION>
                   Name                                 Shares Held    Options Held (1)
      -------------------------------                   ------------   ----------------

<S>                                                      <C>              <C>
Susan E. Alderton (2) ........................              511            4,000

Eugene K. Anderson ...........................              -0-              -0-

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

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

Lisa Simmons Epstein .........................              298              -0-

David B. Garten ..............................              500           11,500

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

Robert D. Hardy ..............................              318              -0-

J. Mark Hollingsworth ........................              -0-              -0-

Keith A. Johnson .............................              100              -0-

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

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

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

J. Landis Martin (3) .........................           56,128           60,000

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

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

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

Kenneth R. Peak ..............................              -0-              -0-

Glenn R. Simmons .............................              534              -0-

Harold C. Simmons (4) ........................              -0-              -0-

Richard A. Smith .............................               30              -0-

Thomas P. Stafford ...........................              -0-            5,000

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

J. Walter Tucker, Jr. (5) ....................              875              -0-

Steven L. Watson .............................            4,474              -0-

Lawrence A. Wigdor ...........................              -0-              -0-
</TABLE>

----------

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

(2)      Includes 11 Shares held by the trustee for the benefit of Ms.  Alderton
         under the NL Industries,  Inc. Retirement Savings Plan (the "NL Savings
         Plan").

(3)      Includes  520 Shares held by the trustee for the benefit of Mr.  Martin
         under the NL Savings Plan.

(4)      Mr. Simmons may also be deemed to possess indirect beneficial ownership
         of the Shares  described in Item 5(a) of this  Statement.  Mr.  Simmons
         disclaims beneficial ownership of all Shares.

(5)      Includes 525 Shares held by Statewide  Guaranty  Title Company of which
         Mr. Tucker owns 100% of the outstanding common stock.


<PAGE>


<TABLE>
<CAPTION>
                                  Exhibit Index

<S>               <C>
Exhibit 1         Credit  Agreement  dated as of November  6, 1998 among  Valhi,
                  Inc., the financial  institutions from time to time that are a
                  party thereto and Societe  Generale,  Southwest Agency, as the
                  administrative agent, issuing bank and arranger  (incorporated
                  by reference to Exhibit 1 to Amendment  No. 59 to the Schedule
                  13D  filed  on  November  23,  1999  with the  Securities  and
                  Exchange Commission by Tremont Corporation,  Valmont Insurance
                  Company,  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  Combined  Master
                  Retirement  Trust,  the Harold  Simmons  Foundation,  Inc. and
                  Harold C. Simmons with respect to the common stock,  par value
                  $0.125 per share, of NL Industries, Inc.).

Exhibit 2         First  Amendment  Agreement dated as of November 5, 1999 among
                  Valhi, Inc., the financial institutions from time to time that
                  are a party thereto and Societe Generale, Southwest Agency, as
                  the   administrative   agent,   issuing   bank  and   arranger
                  (incorporated by reference to Exhibit 2 to Amendment No. 60 to
                  the   Schedule  13D  filed  on  December  14,  1999  with  the
                  Securities  and Exchange  Commission  by Tremont  Corporation,
                  Valmont Insurance  Company,  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 Combined Master
                  Retirement  Trust,  the Harold  Simmons  Foundation,  Inc. and
                  Harold C. Simmons with respect to the common stock,  par value
                  $0.125 per share, of NL Industries, Inc.).

Exhibit 3         Second Amendment  Agreement dated as of November 3, 2000 among
                  Valhi, Inc., the financial institutions from time to time that
                  are a party thereto 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  this
                  Statement).

Exhibit 4         Stock Purchase  Agreement dated as of November 7, 2000 between
                  Valhi, Inc. and J. Landis Martin (incorporated by reference to
                  Exhibit 4 to Amendment No. 16 to this Statement).

Exhibit 5*        Certificate of Incorporation of Tremont Group, Inc.

Exhibit 6*        Voting  Agreement dated as of December 31, 2000 between Valhi,
                  Inc. and Tremont Holdings, LLC.

Exhibit 7*        Tax  Sharing  Purchase  Agreement  dated as of January 1, 2001
                  among Valhi, Inc., Contran Corporation and NL Industries, Inc.

Exhibit 8*        Tax  Sharing  Purchase  Agreement  dated as of January 1, 2001
                  among   Valhi,   Inc.,   Contran   Corporation   and   Tremont
                  Corporation.
</TABLE>

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*        Filed herewith.



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