Agatha Christie her service in September 1918. After the war, Agatha and Archie Christie settled in a flat at 5 Northwick Terrace in St. John's Wood, northwest London. Christie had long been a fan of detective novels, having enjoyed Wilkie Collins's "The Woman in White" and "The Moonstone", as well as Sir Arthur Conan Doyle's early Sherlock Holmes stories. She wrote her own detective novel, "The Mysterious Affair at Styles", featuring Hercule Poirot, a former Belgian police officer noted for his twirly large "magnificent moustaches" and egg-shaped head. Poirot had taken refuge in Britain after Germany invaded Belgium. Christie's inspiration for the
Agatha Christie's Poirot of the final episode, only slightly short of the target he had set himself (in a 2007 interview) of completing the entire canon before his 65th birthday. The short stories and novellas "The Submarine Plans", "The Market Basing Mystery", "Christmas Adventure," "The Mystery of the Baghdad Chest," "The Second Gong," "The Incident of the Dog's Ball," and "Hercule Poirot and the Greenshore Folly" were not filmed in their original short story format, as Agatha Christie later rewrote these stories as novellas or novels ("The Incredible Theft", "Murder in the Mews", "The Adventure of the Christmas Pudding", "The Mystery of the