Sherlock Holmes receives a cipher message from Fred Porlock, an agent of Professor Moriarty. However, Porlock changes his mind for fear of Moriarty's discovering that he is a traitor and he decides not to send the key to the cipher, but he sends Holmes a note telling of this decision. From the cipher message and the second note, Holmes is able to deduce that it is a book-cipher. Holmes is able to decipher the message as a warning that "some devilry is intended against one Douglas", a country gentleman residing at Birlstone House. Some minutes later, Inspector Macdonald arrives at Baker Street with news that a Mr. John Douglas of Birlstone Manor House has been murdered. Holmes, Watson, and MacDonald travel to Birlstone House, an ancient moated manor house, to investigate the crime.

Medie	Bøger Paperback Bog (Bog med blødt omslag og limet ryg)
Udgivet	15. april 2019
ISBN13	9788027333103
Forlag	E-Artnow
Antal sider	108
Mål	152 × 229 × 6 mm · 154 g
Sprog	Engelsk

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