The Sign of the Four has been adapted multiple times for film, in multiple languages, and served as the basis for an episode of the BBC television show Sherlock starring Martin Freeman and Benedict Cumberbatch.
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Sir Arthur Conan Doyle was born in Edinburgh, Scotland, in 1859. Before starting his writing career, Doyle attended medical school, where he met the professor who would later inspire his most famous creation, Sherlock Holmes. A Study in Scarlet was Doyle's first novel; he would go on to write more than sixty stories featuring Sherlock Holmes. He died in England in 1930.