EXHIBIT 23.3 [LETTERHEAD OF MILLER AND LENTS, LTD. APPEARS HERE] March 28, 2003 Cross Timbers Royalty Trust P.O. Box 830650 Dallas, TX 75283-0650 Re: Cross Timbers Royalty Trust 2002 Annual Report on Form 10-K Gentlemen: The firm of Miller and Lents, Ltd., consents to the use of its name and to the use of its report dated March 4, 2003, regarding the Cross Timbers Royalty Trust Proved Reserves and Future Net Revenues as of December 31, 2002, in the 2002 Annual Report on Form 10-K. Miller and Lents, Ltd., has no interests in the Cross Timbers Royalty Trust or in any affiliated companies or subsidiaries and is not to receive any such interest as payment for such reports and has no director, officer, or employee otherwise connected with Cross Timbers Royalty Trust. We are not employed by Cross Timbers Royalty Trust on a contingent basis. Yours very truly, MILLER AND LENTS, LTD. By /s/ R. W. Frazier ----------------------------- R. W. Frazier President