AA question of proofA question of proofde Nicholas BlakeMateriasAlumni and alumnaeFictionNigel Strangeways (Fictitious character)MurderPrivate investigatorsUniversity of OxfordEdiciones (1)A question of proof (1935)Published for the Crime Club by Collins · inglésMás obras de Nicholas BlakeThou Shell of Death1936A Penknife in My HeartThe Case of the Abominable Snowman