SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13D Under the Securities Exchange Act of 1934 (Amendment No. 64)* 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) September 27, 2001 (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) 20.6% 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) 20.6% 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) 20.6% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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) 81.5% 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 11,000 NUMBER OF SHARES 8 SHARED VOTING POWER BENEFICIALLY OWNED BY 40,420,406 EACH REPORTING 9 SOLE DISPOSITIVE POWER PERSON WITH 11,000 10 SHARED DISPOSITIVE POWER 40,420,406 11 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 11,000 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. 64 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 4 and 7 of this Statement are hereby amended as set forth below. Item 4. Purpose of Transaction Item 4 is amended as follows: On September 19, 2001, Valhi, Inc., a Delaware corporation of which the Company is a majority owned subsidiary ("Valhi"), sent a letter to Tremont Corporation, a Delaware corporation that is a majority owned subsidiary of Valhi ("Tremont"), and Titanium Metals Corporation, a Delaware corporation that is a 39% owned subsidiary of Tremont ("TIMET"), proposing (the "Proposal") to sell each of Valhi's and Tremont's Shares to TIMET for shares of TIMET common stock and TIMET debt securities on terms to be appropriately determined. A copy of the September 19, 2001 letter is attached hereto as Exhibit 5 and incorporated herein by reference. On September 21, 2001, Valhi issued a press release stating that Valhi would not approve any transaction that may be negotiated with an independent committee of TIMET's board of directors and its advisors without the affirmative vote of a majority of the TIMET shares voting that are held by persons other than Valhi, Tremont and their affiliates. On September 27, 2001, Valhi sent a letter to Tremont and TIMET withdrawing the Proposal. A copy of the September 27, 2001 letter is attached hereto as Exhibit 6 and incorporated herein by reference. 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. Item 7. Material to be Filed as Exhibits. Item 7 is 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 (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 2 FirstAmendment 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 3 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 4 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 5 Letter dated September 19, 2001 from Valhi, Inc. to the board of directors of Titanium Metals Corporation and Tremont Corporation (incorporated by reference to Exhibit 5 to Amendment No. 63 to this Statement). Exhibit 6* Letter dated September 27, 2001 from Valhi, Inc. to the board of directors of Titanium Metals Corporation and Tremont Corporation. ---------- * 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: October 3, 2001 /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: October 3, 2001 /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: October 3, 2001 /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. EXHIBIT INDEX 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 (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 2 FirstAmendment 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 3 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 4 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 5 Letter dated September 19, 2001 from Valhi, Inc. to the board of directors of Titanium Metals Corporation and Tremont Corporation (incorporated by reference to Exhibit 5 to Amendment No. 63 to this Statement). Exhibit 6* Letter dated September 27, 2001 from Valhi, Inc. to the board of directors of Titanium Metals Corporation and Tremont Corporation. ---------- * Filed herewith.