The Sign of the Four and play adaptations insure this book: The Sign of the Four was also adapted for radio by Bert Coules in 1989 as part of BBC Radio 4's complete audio Sherlock Holmes, with Clive Merrison as Holmes, Michael Williams as Watson, and featuring Brian Blessed as Jonathan Small. 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"
The Exploits of Sherlock Holmes Greene relates in "John Dickson Carr: The Man Who Explained Miracles". There is some doubt about who wrote what—though at times Carr's highly recognisable style breaks through the convention of pastiching the original Conan Doyle stories. In any case, the book published in 1954 was not a great success at the time, though collectors take an interest in it, and the experiment of writing more new Sherlock Holmes exploits was not repeated by these two writers. In 1963 John Murray published two paperback volumes which divided the stories into "The Exploits of Sherlock Holmes" by Adrian Conan Doyle and "More