-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 StsTIsYjdVzR9tayD4VLSgcy3onqmq/QVDSZZcpRSh9f0v/83CqcIcWuq339dJBb
 narCgK+MSAzPaF8kUmMMCg==

<SEC-DOCUMENT>0000010742-00-000005.txt : 20000203
<SEC-HEADER>0000010742-00-000005.hdr.sgml : 20000203
ACCESSION NUMBER:		0000010742-00-000005
CONFORMED SUBMISSION TYPE:	SC 13G
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20000128

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MESA ROYALTY TRUST/TX
		CENTRAL INDEX KEY:			0000313364
		STANDARD INDUSTRIAL CLASSIFICATION:	OIL ROYALTY TRADERS [6792]
		IRS NUMBER:				746284806
		STATE OF INCORPORATION:			TX
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G
		SEC ACT:		
		SEC FILE NUMBER:	005-30270
		FILM NUMBER:		516853

	BUSINESS ADDRESS:	
		STREET 1:		712 MAIN STREET
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77210
		BUSINESS PHONE:		7132165100

	MAIL ADDRESS:	
		STREET 1:		P O BOX 4717
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77210

FILED BY:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			BECK MACK & OLIVER LLC
		CENTRAL INDEX KEY:			0000010742
		STANDARD INDUSTRIAL CLASSIFICATION:	 []
		IRS NUMBER:				130477010
		STATE OF INCORPORATION:			NY
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		SC 13G

	BUSINESS ADDRESS:	
		STREET 1:		330 MADISON AVE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		2126612640

	MAIL ADDRESS:	
		STREET 1:		330 MADISON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>SC 13G
<SEQUENCE>1
<TEXT>






                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G



                    Under the Securities Exchange Act of 1934



                               Mesa Royalty Trust
                                (Name of Issuer)

                            Units of Beneficial Interest
                         (Title of Class of Securities)

                                    590660106
                                 (CUSIP Number)



Check the following box if a fee is being paid with this statement / /. (A fee
is not required only if the filing person: (1) has a previous statemen 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).

*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 the
disclosures provided in prior cover page.

The information required in 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).


SEC 1745 (10-88)


                                                                     Page 1 of 5
                                  SCHEDULE 13G

CUSIP NO.         590660106

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

         Beck, Mack & Oliver LLC
         13-0477010

2.       CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) / /.
                                                           (b) / /.

3.       SEC USE ONLY


4.       CITIZENSHIP OR PLACE OF ORGANIZATION

         New York

                                 5.       SOLE VOTING POWER
                                          0
           NUMBER OF
            SHARES               6.       SHARED VOTING POWER
         BENEFICIALLY                     0
           OWNED BY
             EACH                7.       SOLE DISPOSITIVE POWER
           REPORTING                      0
            PERSON
             WITH                8.       SHARED DISPOSITIVE POWER
                                          300,304 shares

9.       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         300,304 shares

10.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
         / /.

11.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
         16.11%

12.      TYPE OF REPORTING PERSON*
         IA


                      *SEE INSTRUCTION BEFORE FILLING OUT!



                                                                     Page 2 of 5
                            STATEMENT ON SCHEDULE 13G


Item 1(a).   Name of Issuer:

             Mesa Royalty Trust

Item 1(b).   Address of Issuer's Principal Executive Offices:

             712 Main Street
             Houston, Texas   77002



Item 2(a).   Names of Person Filing:

             Beck, Mack & Oliver LLC

Item 2(b).   Address of Principal Business Office or, if none, Residence:

             330 Madison Avenue
             New York, New York   10017


Item 2(c).   Citizenship:

             New York

Item 2(d).   Title of Class of Securities:

             Units of Beneficial Interest

Item 2(e).   CUSIP Number:

             590660106



Item 3.      If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b),
             check whether the person filing is a:

             (a) / / Broker or Dealer registered under Section 15 of the Act
             (b) / / Bank as defined in section 3(a)(6) of the Act
             (c) / / Insurance Company as defined in section 3(a)(19) of the Act
             (d) / / Investment Company registered under section 8 of the
                 Investment Company Act
             (e) /X/ Investment Advisor registered under section 203 of the
                 Investment Advisers Act
             (f) / / Employee Benefit Plan, Pension Fund which is subject to the
                 provisions of the Employee Retirement Income Security Act of
                 1974 or Endowment Fund; see Section 240.13d-1(b)(ii)(F) (Note:
                 See Item 7)


                                                                     Page 3 of 5
             (g) / / Parent Holding Company, in accordance with Section
                 240.13d-1(b)(ii) (G).  (Note: See Item 7)
             (h) / / Group, in accordance with Sec. 240.13d-1(b)(ii)(H).

Item 4.  Ownership:

         (a) Amount Beneficially Owned: 300,304 of 31st December, 1999

         (b) Percent of Class: 16.11%

         (c) Number of shares as to which such person has:

                  (i) sole power to vote or to direct the vote:

                  (ii) shared power to vote or to direct the vote:

                  (iii) sole power to dispose or to direct the disposition of:


                  (iv) shared power to dispose or to direct the disposition of:
                       300,304

Item 5.           Ownership of Five Percent or Less of a Class:

                  Not Applicable

Item 6.           Ownership of More than Five Percent on Behalf of Another
                  Person:

                  See Item 6

Item 7.           Identification and Classification of the Subsidiary Which
                  Acquired the Security Being Reported on By the Parent Holding
                  Company:

                  Not Applicable

Item 8.           Identification and Classification of Members of the Group:

                  Not Applicable

Item 9.           Notice of Dissolution of Group:

                  Not Applicable

Item 10.          Certification:

                  By signing below, I certify that, to the best of my knowledge
                  and belief, the securities referred to above were acquired in
                  the ordinary course of business and were not acquired for the
                  purpose of and do not have the effect of changing or
                  influencing the control of the issuer of such securities and
                  were not acquired in connection with or as a participant in
                  any transaction having such purposes or effect.


                                                                     Page 4 of 5
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.


Dated: 27th January, 2000

                                            /s/  Robert C. Beck
                                            ------------------------
                                            Name: Robert C. Beck
                                            Title: Senior Member

ITEM 6   OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

         The securities covered by this statement are owned by investment
         advisory clients of BECK, MACK & OLIVER LLC.  These clients have the
         right to receive or the power to direct the receipt of dividends
         from, or the proceeds from the sale of, such securities.  No one of
         these clients owns more than 5% of such class of securities.

 Page 5 of 5
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----
