Baritsu is the name given to a form of martial art described by Sir Arthur Conan Doyle in the 1903 Sherlock Holmes story "The Adventure of the Empty House", the first of The Return of Sherlock Holmes. Baritsu was used to explain how Holmes had managed to avoid falling into the Reichenbach Falls with Professor Moriarty as described in the 1893 story "The Final Problem". "The Adventure of the Empty House" was first published in Collier's on 26 September 1903.