Historian. Personal and professional correspondence (1932–1956); Tompkins’s book manuscripts (n.d.) on the Soviet Union; lecture notes (n.d.) used by Tompkins in his classes on Russian history; student grade registers (1932–1955) from Tompkins’s courses at the University of Oklahoma; and Tompkins’s diary (1917) detailing his experiences with the Sixth Canadian Trench Mortar Battery in France during World War I.