What is "bartitsu"

Bartitsu is an eclectic martial art and self-defence method originally developed in England during the years 1898–1902. In 1903, it was immortalised (as " baritsu") by Sir Arthur Conan Doyle, author of the Sherlock Holmes mystery stories. Although dormant throughout most of the 20th century, Bartitsu has been experiencing a revival since 2002.