The Sign of the Four The Sign of the Four The Sign of the Four (1890), also called The Sign of Four, is the second novel featuring Sherlock Holmes written by Sir Arthur Conan Doyle. Doyle wrote four novels and 56 short stories featuring the fictional detective. The story is set in 1888. "The Sign of the Four" has a complex plot involving service in India, the Indian Rebellion of 1857, a stolen treasure, and a secret pact among four convicts ("the Four" of the title) and two corrupt prison guards. It presents the detective's drug habit and humanizes him in a way that had
Sherlock Holmes in popular literature, making him (as of 2017) the only fictional character thus honoured. The popularity of Sherlock Holmes has meant that many writers other than Arthur Conan Doyle have created tales of the detective in a wide variety of different media, with varying degrees of fidelity to the original characters, stories, and setting. According to "The Alternative Sherlock Holmes: Pastiches, Parodies, and Copies" by Peter Ridgway Watt and Joseph Green, the first known period pastiche dates from 1893. Titled "The Late Sherlock Holmes", it came from the pen of Conan Doyle's close friend, J. M. Barrie. A common pastiche