Hercule Poirot sort of obsessive-compulsive" in Poirot. As mentioned in "Curtain" and "The Clocks", he is fond of classical music, particularly Mozart and Bach. In "The Mysterious Affair at Styles", Poirot operates as a fairly conventional, clue-based and logical detective; reflected in his vocabulary by two common phrases: his use of "the little grey cells" and "order and method". Hastings is irritated by the fact that Poirot sometimes conceals important details of his plans, as in "The Big Four". In this novel, Hastings is kept in the dark throughout the climax. This aspect of Poirot is less evident in the later novels,
Hercule Poirot "little grey cells". Poirot also bears a striking resemblance to A. E. W. Mason's fictional detective, Inspector Hanaud of the French Sûreté, who first appeared in the 1910 novel "At the Villa Rose" and predates the first Poirot novel by ten years. Unlike the models mentioned above, Christie's Poirot was clearly the result of her early development of the detective in her first book, written in 1916 and published in 1920. His Belgian nationality was interesting because of Belgium's occupation by Germany, which also provided a plausible explanation of why such a skilled detective would be out of work and