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 as he reads a book on the London Underground. In the PBS series "The Men Who Made The Movies", Hitchcock explained how he used early sound recording as a special element of the film, stressing the word "knife" in a conversation with the woman suspected of murder. During this period, Hitchcock directed segments for a BIP revue, "Elstree Calling" (1930), and directed a short film, "An Elastic Affair" (1930), featuring two "Film Weekly" scholarship winners. "An Elastic Affair" is one of the lost films. In 1933 Hitchcock was once again working for Michael Balcon at Gaumont British. His first film