Question: Who wrote the play on which Alfred Hitchcock's first Technicolor film was based ?

full_context: Document 1: The 39 Steps (1935 film): The 39 Steps is a 1935 British thriller film directed by Alfred Hitchcock, starring Robert Donat and Madeleine Carroll. Very loosely based on the 1915 adventure novel "The Thirty-Nine Steps" by John Buchan, the film is about an everyman civilian in London, Richard Hannay, who becomes caught up in preventing an organization of spies called the 39 Steps from stealing British military secrets. After being mistakenly accused of the murder of a counter-espionage agent, Hannay goes on the run to Scotland with an attractive woman in the hopes of stopping the spy ring and clearing his name.
Document 2: Patricia Highsmith: Patricia Highsmith (January 19, 1921 – February 4, 1995) was an American novelist and short story writer, known for her psychological thrillers, which led to more than two dozen film adaptations. Her first novel, "Strangers on a Train", has been adapted for stage and screen numerous times, notably by Alfred Hitchcock in 1951. Highsmith wrote 22 novels, including her series of five novels with Tom Ripley as protagonist, and many short stories. Existentialism is the literary movement that most influenced her writing, with "Dostoyevsky and Gide through Camus and Sartre" among her favorite authors. Graham Greene described Highsmith as "the poet of apprehension rather than fear. Fear after a time...is narcotic, it can lull one by fatigue into sleep, but apprehension nags at the nerves gently and inescapably." Published under the pseudonym of "Claire Morgan," Highsmith wrote the first lesbian novel with a happy ending, "The Price of Salt", republished 38 years later as "Carol" under her own name.
Document 3: The Lady Vanishes: The Lady Vanishes is a 1938 British mystery thriller film directed by Alfred Hitchcock, starring Margaret Lockwood and Michael Redgrave. Written by Sidney Gilliat and Frank Launder based on the 1936 novel "The Wheel Spins" by Ethel Lina White, the film is about a beautiful English tourist travelling by train in continental Europe who discovers that her elderly travelling companion seems to have disappeared from the train. After her fellow passengers deny ever having seen the elderly lady, the young woman is helped by a young musicologist, the two proceeding to search the train for clues to the old lady's disappearance.
Document 4: The Long Rope (film): The Long Rope is a 1961 American Western film directed by William Witney and written by Robert Hamner. The film stars Hugh Marlowe, Alan Hale, Jr., Robert J. Wilke, Chris Robinson, William Kerwin and Jeff Morris. The film was released in February 1961, by 20th Century Fox.
Document 5: Under Capricorn: Under Capricorn is a 1949 British historical thriller film directed by Alfred Hitchcock about a couple in Australia who started out as lady and stable boy in Ireland, and who are now bound together by a horrible secret. The film was based on the novel "Under Capricorn" (1937) by Helen Simpson, with a screenplay by James Bridie. It was adapted to the screen by Hume Cronyn. This was Hitchcock's second film in Technicolor, and like the preceding color film "Rope" (1948), it also featured 10-minute takes.
Document 6: Tightrope (film): Tightrope is a 1984 American suspense thriller produced by and starring Clint Eastwood and written and directed by Richard Tuggle.
Document 7: Rope (film): Rope is a 1948 American psychological crime thriller film noir directed by Alfred Hitchcock, based on the 1929 play of the same name by Patrick Hamilton, adapted by Hume Cronyn and with a screenplay by Arthur Laurents.
Document 8: The Girl (2012 TV film): The Girl is a 2012 British television film directed by Julian Jarrold, written by Gwyneth Hughes and produced by the BBC and HBO Films. The film stars Sienna Miller as Tippi Hedren and Toby Jones as Alfred Hitchcock. It is based on Donald Spoto's 2009 book, "Spellbound by Beauty: Alfred Hitchcock and His Leading Ladies", which discusses British-born film director Hitchcock and the women who played leading roles in his films. "The Girl"' s title was inspired by Hitchcock's alleged nickname for Hedren.
Document 9: The Manxman: The Manxman is a 1929 British silent drama film directed by Alfred Hitchcock and starring Anny Ondra, Carl Brisson and Malcolm Keen. The film is based on a popular 1894 romantic novel "The Manxman" by Hall Caine, which had previously been made into a film 12 years earlier. It was the last silent film that Hitchcock directed before he made the transition to sound film with his next film "Blackmail".
Document 10: Alfred Hitchcock's Mystery Magazine: "AHMM" was founded in 1956 by HSD Publications, which licensed the use of the director's name. Though there was no formal connection with the television show, stories published in the magazine were sometimes adapted by the producers of "Alfred Hitchcock Presents" (and later, "The Alfred Hitchcock Hour)". A few writers, such as Henry Slesar, wrote for both. Other contributors during the magazine’s early years included Evan Hunter/Ed McBain, Ed Lacy, Bill Pronzini, Jim Thompson, Donald E. Westlake and Charles Willeford (who briefly worked for the magazine, as did Patricia Hitchcock. Alfred's daughter).
Document 11: Sleuth (1972 film): Sleuth is a 1972 British mystery thriller film directed by Joseph L. Mankiewicz and starring Laurence Olivier and Michael Caine. The screenplay by playwright Anthony Shaffer was based on his 1970 Tony Award-winning play. Both Olivier and Caine were nominated for Academy Awards for their performances. This was Mankiewicz's final film. Critics gave the film overwhelmingly positive reviews, and would later note similarities between it and Caine's 1982 film "Deathtrap".
Document 12: North by Northwest: North by Northwest is a 1959 American thriller directed by Alfred Hitchcock and starring Cary Grant, Eva Marie Saint and James Mason. The screenplay was by Ernest Lehman, who wanted to write "the Hitchcock picture to end all Hitchcock pictures".
Document 13: Psycho (1960 film): Psycho is a 1960 American psychological horror film directed and produced by Alfred Hitchcock, and written by Joseph Stefano, starring Anthony Perkins, Janet Leigh, John Gavin, Vera Miles and Martin Balsam, and was based on the 1959 novel of the same name by Robert Bloch. The film centers on the encounter between a secretary, Marion Crane (Leigh), who ends up at a secluded motel after stealing money from her employer, and the motel's disturbed owner-manager, Norman Bates (Perkins), and its aftermath.
Document 14: Sabotage (1936 film): Sabotage, also released as The Woman Alone, is a 1936 British espionage thriller film directed by Alfred Hitchcock and starring Sylvia Sidney, Oskar Homolka, and John Loder. It is loosely based on Joseph Conrad's novel "The Secret Agent", about a woman who discovers that her husband is an agent terrorist. "Sabotage" should not be confused with Hitchcock's film "Secret Agent", also released in 1936, but based on the stories of W. Somerset Maugham
Document 15: Marnie (film): Marnie is a 1964 American psychological thriller film directed by Alfred Hitchcock. The screenplay by Jay Presson Allen was based on the 1961 novel of the same name by Winston Graham. The film stars Tippi Hedren and Sean Connery.
ground_truth: Patrick Hamilton,