Puerto de la Cruz in the island of Tenerife in the Canary Islands. The Villa La Paz still exists, and is one of the heritage-listed buildings in the town. Unluckily, the "cypresses walk" has been detached from the garden by a new road, but there are still commanding and impressive views of the ocean and the cliff. References in other works Christie re-uses the plot device of the train smoke from The Sign in the Sky as an alibi in Taken at the Flood (1948). Adaptations The Coming of Mr Quin, the first short story in the Anthology, would be adapted into film as The Passing of Mr. Quinn in 1928, directed by Julius Hagen and Leslie S. Hiscott and adapted by Hiscott. The cast included: Stewart Rome ... Dr Alec Portal Trilby Clark ... Mrs Eleanor Appleby Ursula Jeans ... Vera, the Maid Clifford Heatherley ... Professor Appleby Mary Brough ... Cook Vivian Baron ... Derek Cappel Kate Gurney ... Landlady The film, in turn, was "novelized" as The Passing of Mr. Quinn by G. Roy McRae (London Book Company, 1929). The (unpublished) play Someone at the Window (1934) was adapted by Christie from the short story The Dead Harlequin. A series of abridged readings of three of the stories ("The Coming of Mr Quin", "The Soul of the Croupier", "At the 'Bells and Motley'") were broadcast 15–17 September 2009 on BBC Radio 4 as part of the Afternoon Readings program and performed by Martin Jarvis. A second series of abridged readings ("The World's End", "The Face of Helen", "The Sign in the Sky") was broadcast 15–17 September 2010 on BBC Radio 4 and again performed by Martin Jarvis. A third set ("The Dead Harlequin", "The Man from the Sea", "Harlequin's Lane") was broadcast 6–8 September 2011 on BBC Radio 4 and again performed by Martin Jarvis. The readings have since been rebroadcast on BBC Radio 4 Extra. Other appearances of Harley Quin or Mr Satterthwaite In Agatha Christie's Autobiography, she claims that Quin and Satterthwaite became two of her favourite characters. The latter appeared in the 1935 novel, Three Act Tragedy, and very briefly in the short story Dead Man's Mirror, a 1937 collection of four short stories. Outside of this collection, Quin appeared in two further short stories: The Harlequin Tea Set and The Love Detectives, which were both included in the 1992 UK collection Problem at