American silent film comedian whose hugely successful career disappeared virtually overnight, Larry Semon was the son of a traveling vaudeville magician, Zera the Great. He grew up in show business and was trained in stage comedy and acrobatics. A talent for drawing and cartooning led to art school and then work as a cartoonist for various New York City newspapers. The humor evident in his published cartoons prompted executives at New York's Vitagraph Studios to hire him as a gag writer in 1916....