After a rough start in New Jersey, movie maker Mack Sennett and his Keystone Comedies arrived in Edendale in September, 1912, and took up the studio lot that had been left by Bison Pictures when they decamped to Inceville. Though he started in Edendale with a run-down and mostly vacant lot, he soon achieved great success, and took up on both sides of the street within a few years. Between 1913 and 1917, comedy was synonymous with Keystone. There, Mack Sennett was the first important producer and director of screen farce, where speed, irreverence, exaggeration, sight gags, and bam-bam-bam delivery defined comedy. "You had to understand comic motion," Sennett once told an interviewer, whereupon he pushed the interviewer into a swimming pool. "That is comic motion." Sennett was famous for his Keystone Cops, who bumbled all around Echo Park, and his Sennett Bathing Beauties, who included Gloria Swanson and Carole Lombard. Fatty Arbuckle made many movies at Keystone, and Charlie Chaplin was discovered there. His great female lead was Mabel Normand, his sometime girlfriend (who inspired the 1974 Broadway musical "Mack & Mabel").