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 .\rbr\rbrThe 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 .\rbr\rbr\rbr\rbrA Scandal in Bohemia was the first of Arthur Conan Doyles 56 Sherlock Holmes short stories to be published in The Strand Magazine and the first Sherlock .\rbr\rbrBBC Radio: Sherlock Holmes - The Valley of Fear (Part 2 - The Tragedy of Belston) The Valley of Fear is the fourth and final Sherlock Holmes novel by Sir Arthur .