Buster Keaton and Edward F. Cline, making two-reel films for Joseph M. Schenck for distibution by Metro Pictures (1920)Metro Pictures, Public domain, via Wikimedia CommonsA still from the opening scene of Cops. Keaton's character appears to be in prison, but the next shot shows that he is simply standing behind a gate. (1922)Edward F. Cline / Buster Keaton, Public domain, via Wikimedia CommonsEdward F. ClineEvans (L.A.), Public domain, via Wikimedia CommonsStill from the American silent comedy film The Playhouse (1921) with Edward F. Cline and Buster Keaton, page 62 of the December 1921 Photoplay. (2013)First National Pictures Inc., Public domain, via Wikimedia CommonsEdward F. ClineImage via TMDBEdward F. ClineImage via TMDBEdward F. ClineImage via TMDBPhotograph of Buster Keaton with his writing staff. Caption reads as follows:Buster Keaton's gag department at work, with (left to right) Joe Mitchell, Clyde Br (1923)Photoplay Publishing Company; no photographer credited, Public domain, via Wikimedia CommonsFrom left to right in this photo, They are: Joseph A. Mitchell, Clyde Bruckman, Buster Keaton, Jean C. Havez, and Edward F. Cline. (1923)Unknown photographer, Public domain, via Wikimedia Commons