SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 10) SAN JUAN BASIN ROYALTY TRUST -------------------------------------------------------- (Name of Issuer) UNITS OF BENEFICIAL INTEREST -------------------------------------------------------- (Title of Class of Securities) 798241105 -------------------------------------------------------- (CUSIP Number) Michael S. Paquette Senior Vice President and Controller Fund American Enterprises Holdings, Inc. 80 South Main Street Hanover, NH 03755 (603) 640-2205 -------------------------------------------------------- (Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications) April 13, 1999 -------------------------------------------------------- (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 which is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(b)(3) or (4), check the following box / /. Check the following box if a fee is being paid with this statement / /. (A fee is not required only if the reporting person: (1) has a previous statement on file reporting beneficial ownership of more than five percent of the class of securities described in Item 1; and (2) has filed no amendment subsequent thereto reporting beneficial ownership of five percent or less of such class. (See Rule 13d-7.) NOTE: Six copies of this statement, including all exhibits, should be filed with the Commission. See Rule 13d-1(a) for other parties to whom copies are to be sent.

CUSIP NO. 79 8241105 - ------------------------------------------------------------------------------- (1) Name of Reporting Person. S.S. or I.R.S. Identification No. of Above Person Fund American Enterprises Holdings, Inc. ("FAEH") 94-2708455 - ------------------------------------------------------------------------------- (2) Check the Appropriate Box if a Member (a) of a Group (See Instructions) ------------------------------ - ------------------------------------------- (b) ------------------------------ - ------------------------------------------------------------------------------- (3) (SEC Use Only) - ------------------------------------------------------------------------------- (4) Source of Funds (See Instructions) - ------------------------------------------------------------------------------- (5) Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) - ------------------------------------------------------------------------------- (6) Citizenship or Place of Organization DELAWARE - ------------------------------------------------------------------------------- Number of Shares (7) Sole Voting Power Beneficially Owned by Each Reporting ----------------------------------------------- Person With (8) Shared Voting Power 4,144,876 Units of Beneficial Interest ("Units") ----------------------------------------------- (9) Sole Dispositive Power ----------------------------------------------- (10) Shared Dispositive Power 4,144,876 Units of Beneficial Interest ("UNITS") - ------------------------------------------------------------------------------- (11) Aggregate Amount Beneficially Owned by Each Reporting Person 4,144,876 Units - ------------------------------------------------------------------------------- (12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) - ------------------------------------------------------------------------------- (13) Percent of Class Represented by Amount in Row (11) Approximately 8.9% - -------------------------------------------------------------------------------

(14) Type of Reporting Person (See Instructions) HC, CO CUSIP NO. 79 8241105 - ------------------------------------------------------------------------------- 2

(1) Name of Reporting Person. S.S. or I.R.S. Identification No. of Above Person Fund American Enterprises, Inc. ("FAE") 04-3357154 - ------------------------------------------------------------------------------- (2) Check the Appropriate Box if a Member (a) of a Group (See Instructions) ------------------------------ - ------------------------------------------- (b) ------------------------------ - ------------------------------------------------------------------------------- (3) (SEC Use Only) - ------------------------------------------------------------------------------- (4) Source of Funds (See Instructions) - ------------------------------------------------------------------------------- (5) Check if Disclosure of Legal Proceedings is Required Pursuant to Items 2(d) or 2(e) - ------------------------------------------------------------------------------- (6) Citizenship or Place of Organization DELAWARE - ------------------------------------------------------------------------------- Number of Shares (7) Sole Voting Power Beneficially Owned by Each Reporting ----------------------------------------------- Person With (8) Shared Voting Power 4,144,876 Units of Beneficial Interest ("Units") ----------------------------------------------- (9) Sole Dispositive Power ----------------------------------------------- (10) Shared Dispositive Power 4,144,876 Units of Beneficial Interest ("UNITS") - ------------------------------------------------------------------------------- (11) Aggregate Amount Beneficially Owned by Each Reporting Person 4,144,876 Units - ------------------------------------------------------------------------------- (12) Check if the Aggregate Amount in Row (11) Excludes Certain Shares (See Instructions) - ------------------------------------------------------------------------------- (13) Percent of Class Represented by Amount in Row (11) Approximately 8.9% - ------------------------------------------------------------------------------- 3

(14) Type of Reporting Person (See Instructions) HC, CO - ------------------------------------------------------------------------------- 4

ONLY ITEMS REPORTED IN THIS AMENDMENT NO. 10 TO SCHEDULE 13D ARE AMENDED FROM THE FILING ON SCHEDULE 13D DATED DECEMBER 28, 1990 (THE "SCHEDULE 13D"), AS AMENDED BY AMENDMENT NO. 1 DATED FEBRUARY 13, 1992, AMENDMENT NO. 2 DATED NOVEMBER 6, 1992, AMENDMENT NO. 3 DATED APRIL 27, 1993, AMENDMENT NO.4 DATED JUNE 23, 1993, AMENDMENT NO. 5 DATED JULY 7, 1993, AMENDMENT NO. 6 DATED SEPTEMBER 2, 1993, AMENDMENT NO. 7 DATED DECEMBER 23, 1993, AMENDMENT NO. 8 DATED NOVEMBER 20, 1997 AND AMENDMENT NO. 9 DATED MARCH 25, 1999. ALL OTHER ITEMS REMAIN UNCHANGED. UNLESS OTHERWISE SPECIFIED, ALL DEFINED TERMS USED HEREIN HAVE THE MEANING PREVIOUSLY ASCRIBED TO THEM IN THE SCHEDULE 13D. Item 4. PURPOSE OF TRANSACTION. Consistent with FAEH's current strategy to redeploy its passive investment portfolio into operating businesses (or to pursue other opportunities), FAEH reserves the right to sell all or a portion of its Units at any time and from time to time depending upon market conditions and other factors affecting FAEH's evaluation of the value of the Units or its alternative uses of the proceeds from sales of the Units. Item 5. INTEREST IN SECURITIES OF THE ISSUER. Item 5 is hereby replaced in its entirety: (a) & (b) The aggregate number of Units and the percentage of the outstanding Units owned by the indicated persons named in Item 2 is as follows: PERCENTAGE OF UNITS UNITS BENEFICIALLY BENEFICIALLY PERSON OWNED OWNED -------- -------------- ---------------- FAEH 4,144,876 8.9% FAE 4,144,876 8.9% 5

FAEH shares voting power and dispositive power with FAE with respect to the 4,144,876 Units it holds indirectly through FAE. Other than as set forth above, neither FAEH or FAE, nor, to the best knowledge of FAEH or FAE, any other persons named in Item 2 beneficially owns any Units. (c) There have been no transactions by FAEH or FAE, or to the knowledge of FAEH or FAE, any of the persons listed on Schedule I attached hereto, in Units of Beneficial Interest effected during the past 60 days. (d) None (e) Not Applicable SIGNATURE After reasonable inquiry and to the best of the knowledge and belief of the undersigned, the undersigned certifies that the information set forth in this statement is true, complete and correct. Dated: April 19, 1999 FUND AMERICAN ENTERPRISES HOLDINGS, INC. BY: -------------------------------------------- Name: Michael S. Paquette Title: Senior Vice President and Controller FUND AMERICAN ENTERPRISES, INC. BY: -------------------------------------------- Name: Robert E. Snyder Title: Secretary and Controller 6

SCHEDULE I TO SCHEDULE 13D Following is a list of the directors and executive officers of Fund American Enterprises Holdings, Inc. ("FAEH"), Fund American Enterprises, Inc. ("FAE"), and White Mountains Insurance Company ("WMIC") setting forth the business address and present principal occupation or employment (and the name, principal business and address of any corporation or organization in which such employment is conducted) of each such person. Each such person is a citizen of the USA. Name And Present Principal Business Address Office Occupation Or Employment - ---------------------- ------------------------ -------------------------- FAEH Raymond Barrette Executive Vice President and Executive Vice President and Fund American Enterprises Chief Executive Officer and Chief Executive Officer Holdings, Inc. Director of FAE 80 South Main Street Hanover, NH 03755 John J. Byrne Chairman of the Board Chairman of the Board Fund American Enterprises Holdings, Inc. 80 South Main Street Hanover, NH 03755 Patrick M. Byrne Director President and Chief Executive Centricut, LLC Officer of Fecheimer Bros. Co. 2 Technology Drive, STE 3 West Lebanon, NH 03784 Reid T. Campbell Vice President Vice President Fund American Enterprises Holdings, Inc. 80 South Main Street Hanover, NH 03755 Howard L. Clark, Jr. Director Vice Chairman of Lehman Lehman Brothers Inc. Brothers Inc. American Express Tower New York, NY 10128 Robert P. Cochran Director Chairman, President & Chief Financial Security Assurance Executive Officer of Holdings Ltd. Financial Security Assurance 350 Park Avenue Holdings Ltd. New York, NY 10022 7

SCHEDULE I TO SCHEDULE 13D (CONT.) Name And Present Principal Business Address Office Occupation Or Employment - ---------------------- ------------------------ -------------------------- George J. Gillespie, III Director Partner in Cravath, Cravath, Swaine & Moore Swaine & Moore 825 Eighth Avenue New York, NY 10019 K. Thomas Kemp President, Chief Executive President and Chief Executive Fund American Enterprises Officer & Director of FAEH. Officer Holdings, Inc. Chairman of FAE 80 South Main Street Hanover, NH 03755 Gordon S. Macklin Director Retired 8212 Burning Tree Road Bethesda, MD 20817 Frank A. Olson Director Chairman of the Board & Chief The Hertz Corporation Executive Officer of The Hertz 225 Brae Boulevard Corporation Park Ridge, NJ 07656 Michael S. Paquette Sr. Vice President & Controller Sr. Vice President & Controller Fund American Enterprises Holdings, Inc. 80 South Main Street Hanover, NH 03755 David G. Staples Vice President-Taxation Vice President-Taxation Fund American Enterprises Holdings, Inc. 80 South Main Street Hanover, NH 03755 FAE Raymond Barrette (see above) (see above) (see above) Terry L. Baxter Director of FAE President of White White Mountains Mountains Holdings, Inc. Holdings, Inc. 80 South Main Street Hanover, NH 03755 8

SCHEDULE I TO SCHEDULE 13D (CONT.) Name And Present Principal Business Address Office Occupation Or Employment - ---------------------- ------------------------ -------------------------- K. Thomas Kemp (see above) (see above) (see above) James H. Ozanne President and Director President 76 Olcott Drive, Suite L6 White River Jct, VT 05001 Robert E. Snyder Secretary & Controller Secretary & Controller 76 Olcott Drive, Suite L6 White River Jct, VT 05001 9

SCHEDULE II TO SCHEDULE 13D Sales of Units of San Juan Basin Royalty Trust by the Reporting Persons and by persons listed in Schedule I, within the last 60 days. Sold By Date Number Sold Unit Price -------- --------- ----------------- ----------- FAE 3/26/99 350,000 6.19 FAE 3/29/99 1,000,000 6.00 FAE 4/13/99 500,000 6.25 10