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
Daphne du Maurier du Maurier (1946–69). When she was elevated to the Order of the British Empire as Dame Commander in 1969, she was titled Lady Browning; Dame Daphne du Maurier DBE (1969–89), but she never used the title. According to her biographer Margaret Forster, she told no one about the honour, so that even her children learned of it only from the newspapers. "She thought of pleading illness for the investiture, until her children insisted it would be a great day for the older grandchildren. So she went through with it, though she slipped out quietly afterwards to avoid the attention of