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
Hitchcock (film) the film, his last with Paramount. However, the pressures of the production, such as dealing with Geoffrey Shurlock of the Motion Picture Production Code, and Hitchcock's lecherous habits, such as when they confer with the female lead, Janet Leigh, annoy Alma. She begins a personal writing collaboration with Whitfield Cook on his screenplay at his beach house without Hitchcock's knowledge. Hitchcock eventually discovers what she has been doing and suspects her of having an affair. This concern affects Hitchcock's work on "Psycho". Hitchcock eventually confronts Alma and asks her if she is having an affair. Alma angrily denies it. Alma