The Fall of Buster Keaton: His Films for MGM, Educational Pictures, and Columbia - James L. Neibaur - Google Books

https://books.google.de/books?id=_ELk9327M68C&pg=PA25#v=onepage

Born into a family of vaudevillians, Buster Keaton made his first film appearance in 1917 at the age of 21. By the early 1920s, he had established himself as one of the geniuses of silent cinema with such films as Sherlock, Jr. and The Navigator and his…