Alfred Hitchcock wrote in 1982: "The Hitchcock touch had four hands, and two were Alma's." Hitchcock began work on his tenth film, "Blackmail" (1929), when its production company, British International Pictures (BIP), converted its Elstree studios to sound. The film was the first British ""; it followed the first American sound feature film, "The Jazz Singer" (1927). "Blackmail" began the Hitchcock tradition of using famous landmarks as a backdrop for suspense sequences, with the climax taking place on the dome of the British Museum. It also features one of his longest cameo appearances, which shows him being bothered by a small boy
Alfred Hitchcock the light makes sure that the audience's attention is on the glass. Grant's character is a killer in the book on which the film was based, "Before the Fact" by Francis Iles, but the studio felt that Grant's image would be tarnished by that. Hitchcock therefore settled for an ambiguous finale, although, as he told François Truffaut, he would have preferred to end with the wife's murder. Fontaine won Best Actress for her performance. "Saboteur" (1942) is the first of two films that Hitchcock made for Universal during the decade. Hitchcock was forced by Universal Studios to use Universal contract