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"
Sherlock Holmes (1939 film series) film was released on 31 March 1939. Later that year a second film, "The Adventures of Sherlock Holmes", followed, which was based on "Sherlock Holmes", an 1899 stage play written by William Gillette. Although 20th Century Fox planned to make further "Holmes" films with Rathbone and Bruce, complications in negotiations between the company and the estate of the character's creator, Arthur Conan Doyle, brought a premature end to the studio's involvement; their decision to withdraw from further productions was also because the Second World War meant that "foreign agents and spies were much more typical and topical than the antiquated