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In 2004, the world’s foremost scholar on Sherlock Holmes was found garrotted on his bed. Richard Lancelyn Green had been planning a three-volume biography of Arthur Conan Doyle but had had trouble gaining rights to the author’s private papers and manuscripts, which were scheduled to be auctioned at Christie’s. Lancelyn Green believed that Doyle’s daughter had wanted these to go to the British Library instead, but his efforts to stop the auction had been unsuccessful. In the weeks before his d...