“Which is it to-day,” I asked, “morphine or cocaine?” He raised his eyes languidly from the old black-letter volume which he had opened. “It is cocaine,” he said, “a seven-per-cent solution. Would you care to try it?” The Sign of Four, Sir Arthur Conan Doyle, (1890) Sherlock Holmes is undoubtedly literature’s most famous cocaine user. In Sir Arthur Conan Doyle’s stories, Holmes uses cocaine in order to stimulate his brain when he wasn’t applying it to a case. The detective famously injected a […]