 By 1902, he was associated with (John) Fitzgerald Murphy (a noted actor, playwright, and political activist of the time).During 1904, Sully was the principal actor for several of Fitzgerald Murphy's plays, namely, "The Irish Statesman" and "The Old Mill Stream" at the California Theatre in San Francisco on respectively 6–7 March and the 13 March of that year.He also starred in Fitzgerald's play "The Chief Justice" in Salt Lake City, Utah.