British actor/writer Syd Courtenay is most closely associated with music-hall comedian Leslie Fuller. Beginning in 1919, Courtenay wrote material for several of Fuller's popular revues, doubling as an on-stage comic foil. When Fuller entered films in 1930, Courtenay went right along with him. He scripted and occasionally appeared in such haphazard farces as Not So Quiet on the Western Front (1930), Poor Old Bill (1931), Old Spanish Customers (1932),The Hawleys of the Hight Street (1933), Lost in the Legion (1934) and Captain Bill (1935). One of Syd Courtenay's rare non-comic assignments was the 1936 melodrama The Man Behind the Mask.
~ Hal Erickson, All Movie Guide