[1] Errol toured Australia, New Zealand and Great Britain and Ireland in a variety of theatrical settings, including circuses, operettas, and Shakespeare.

By 1905, in Portland, Oregon, he managed a touring vaudeville company troupe, giving an early boost to the career of a young comedian named Roscoe Arbuckle.

By 1911 Errol had graduated to the New York big time in the 1911 Ziegfeld Follies on Broadway, notably in two skits with the legendary Bert Williams.

He appeared every year in the Follies through 1915, when he is also credited as director of the show [5] that included W.C. Fields, Ed Wynn, as well as Marion Davies as one of the Ziegfeld Girls.

Errol made his first film, a comic short subject titled Nearly Spliced, in 1916 (it was not released before 1921), for pioneering east-coast producer George Kleine.

[citation needed] He left Broadway and went to Hollywood, appearing in Sally and Clothes Make the Pirate alongside Dorothy Gish (both 1925).

Most of these were marital farces in which Leon would get mixed up with a pretty girl or an involved business proposition, and face the wrath of his wife (usually Dorothy Granger); the theme song to the series was the nursery rhyme London Bridge Is Falling Down.

Lord Epping Returns (1951), Errol's next-to-last film, reprised his famous characterization (and some of the gags) introduced in the 1939 feature Mexican Spitfire.