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 Nevertheless, he regards the 1893 case in "The Chocolate Box", as his only actual failure of detection. Again, Poirot is not reliable as a narrator of his personal history and there is no evidence that Christie sketched it out in any depth. During his police career Poirot shot a man who was firing from a roof into the public below. In "Lord Edgware Dies", Poirot reveals that he learned to read writing upside down during his police career. Around that time he met Xavier Bouc, director of the Compagnie Internationale des Wagons-Lits. Poirot also became a uniformed director, working on