Premise: Gray Cowan Boyce (19 February 1899 - 14 May 1981) was an American medieval historian and historical bibliographer whose masterwork was his five volume "Literature of Medieval History, 1930-1975: A Supplement to Louis John Paetow's "A Guide to the Study of Medieval History"" (1981).
Hypothesis: Gray Cowan Boyce was a young man when he died.