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 death he told friends that an unidentified American was following him and that he’d come to fear that his contention over the papers might have put his life in danger.

The coroner returned an open verdict. Lancelyn Green’s best friends said it was not in his nature to take his own life, but others wondered whether he might have arranged his death to cast suspicion on a rival, mirroring the Sherlock Holmes story “The Problem of Thor Bridge,” in which a jealous wife contrives her suicide to cast doubt on a woman her husband had been flirting with.

The case remains unsolved. “I think he wanted it to look like murder,” said James Gibson, who had edited a Doyle bibliography with Lancelyn Green in 1983. “He must have been planning it for days, giving us false clues. He created the perfect mystery.”