Jackson, Wilfred (“Jaxon”) (1906-1988) He joined Disney in 1928 and worked on Steamboat Willie. He served as an animator, director, and as producer-director on the Disneyland television show. He pioneered a method of pre-timing animation with sound, and invented the bar sheet to coordinate the animation action with the sound track. Several of the cartoons he directed were honored with Academy Awards. He also worked as a sequence director on 11 features from Snow White and the Seven Dwarfs to Lady and the Tramp. Jackson retired in 1961, and was honored posthumously as a Disney Legend in 1998.