Esta é uma história de Peter Wimsey por Dorothy L.Sayers. Eu acho que pode ser "A Exploração Aventureira da Caverna de Ali-Baba". De Wikipedia :
As recounted in the short story "The Adventurous Exploit of the Cave of Ali Baba", in December 1927 Wimsey fakes his own death, supposedly while hunting big game in Tanganyika, to penetrate and break up a particularly dangerous and well-organised criminal gang.