Oil prospector. Correspondence (1901, 1931–1939, 1944, 1953) relating to Jesse A. Heydrick’s discovery of oil in Red Fork, Oklahoma; a manuscript (1931) of unpublished chapters for John W. Flenner’s History of Early Oil Developments in Oklahoma; legal papers (1901); newspaper clippings; and a bound report (1953) by Heydrick, entitled “Red Fork Discovery, June 1901.”