EXHIBIT 23.5 October 1, 1999 King Ranch, Inc. 1415 Louisiana, Suite 2300 Wedge International Tower Houston, Texas 77002 Gentlemen: We hereby consent to the filing of our opinion to you dated July 27, 1999, with the Securities and Exchange Commission as Exhibit 8.1 to the St. Mary Land & Exploration Company Registration Statement on Form S-4, and to the use of our name in the Joint Proxy/Consent Statement forming a part of the Registration Statement under the caption "Legal Matters." Very truly yours, /S/ LOCKE LIDDELL & SAPP LLP ----------------------------------- Locke Liddell & Sapp LLP