The Secret Adversary
Christie settled into married life, giving birth to her only child, Rosalind Margaret Clarissa (later Hicks), in August 1919 at Ashfield. Archie left the Air Force at the end of the war and began working in the City financial sector at a relatively low salary. They still employed a maid. Her second novel, "The Secret Adversary" (1922), featured a new detective couple Tommy and Tuppence, again published by The Bodley Head. It earned her £50 (approximately ). A third novel, "Murder on the Links", again featured Poirot, as did the short stories commissioned by Bruce Ingram, editor of "The Sketch" magazine, from 1923. She now had no difficulty selling her work.