Sir Arthur Conan Doyle (2014). “Sherlock Holmes Complete Collection With illustrated Adventures of Sherlock Holmes - 4 Novels, 56 Short Stories and 120+ illustrations”, p.232, Ageless Reads
Oldiees Publishing, Arthur Conan Doyle, Guy de Maupassant, Charles Dickens, E. W. Hornung (2014). “50 Crime Short Stories - THE BEST SHORT WORKS COLLECTION”, p.441, Oldiees Publishing