Hercule Poirot of Police of Brussels, until "the Great War" (World War I) forced him to leave for England. (In "The Mysterious Affair at Styles" Poirot had retired at age 55 in 1905) I had called in at my friend Poirot's rooms to find him sadly overworked. So much had he become the rage that every rich woman who had mislaid a bracelet or lost a pet kitten rushed to secure the services of the great Hercule Poirot. During World War I, Poirot left Belgium for England as a refugee (although he returned a few times). On 16 July 1916 he again
Hercule Poirot partly because there is rarely a narrator to mislead. In "Murder on the Links," still largely dependent on clues himself, Poirot mocks a rival "bloodhound" detective who focuses on the traditional trail of clues established in detective fiction (e.g., Sherlock Holmes depending on footprints, fingerprints, and cigar ash). From this point on, Poirot establishes his psychological bona fides. Rather than painstakingly examining crime scenes, he enquires into the nature of the victim or the psychology of the murderer. He predicates his actions in the later novels on his underlying assumption that particular crimes are committed by particular types of people.