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A cipher message arrives from Fred Porlock, a pseudonymous agent of Professor Moriarty. After Porlock sends the message, however, he changes his mind for fear of Moriarty's discovering that he is a traitor. He decides not to send the key to the cipher, but he sends Holmes a note telling of this decision.
© 2018 Interactive Media (Ebook): 9781787246232
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Ebook: 5 July 2018
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