Mack Swain was a pioneer stage and screen actor who was prominent in Pacific Coast stock appearances when he was young, and later was in the Keystone Comedies with Charlie Chaplin. Swain was a featured player before the days when the screen had "stars."
As Mr. Ambrose, a character Swain developed while at Keystone, he became one of the colorful figures of the pioneer days of film when custard pies and wild, fast action were the vogue. Mr. Ambrose often appeared with Mr. Walrus, a large-mustachioed character played by Chester Conklin.
Among films in which he appeared are "The Gold Rush," Lon Chaney's "Mockery" and "The Last Warning." In 1932, he appeared in the Academy Award nominee for best short "Stout Hearts and Willing Hands," in which Conklin also starred.