Frank Cellier 23 February 1884 27 September 1948 was an English actor Early in his career he toured in Britain Germany the West Indies America and South Africa In the 1920s he became known in the West End for Shakespearean character roles among others and also directed some plays in which he acted Later during the 1930s and 1940s he also appeared in films Beginning in the 1930s Cellier played roles in films including Sheriff Watson in Alfred Hitchcocks The 39 Steps 1935 He was also Monsieur Barsac in the comedy film The Guvnor 1935 Cellier died in London in 1948 aged 64