Joan Harrison (screenwriter) the film "Jamaica Inn" (1939) based on the novel by Daphne du Maurier. When Hitchcock moved to Hollywood in March 1939 to begin his contract with David O. Selznick to direct films, Harrison went with him as an assistant and writer. She continued contributing to the screenplays for Hitchcock's films "Rebecca" (1940), also adapted from a du Maurier novel, "Foreign Correspondent" (1940), "Suspicion" (1941), and "Saboteur" (1942). She was also credited as one of the screenwriters for "Dark Waters" (1944). Harrison was an uncredited screenwriter for "Ride the Pink Horse" (1947) and "Your Witness" (1950). She became a film producer
Gerald du Maurier Gerald du Maurier Sir Gerald Hubert Edward Busson du Maurier (26 March 1873 – 11 April 1934) was an English actor and manager. He was the son of the author George du Maurier and brother of Sylvia Llewelyn Davies. During 1902, he married the actress Muriel Beaumont with whom he had three daughters: writers Angela du Maurier (1904–2002) and Daphne du Maurier (1907–1989), and painter Jeanne du Maurier (1911–1996). His popularity was due to his subtle and naturalistic acting: a "delicately realistic style of acting that sought to suggest rather than to state the deeper emotions". His "Times" obituary said