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 hostel, while in "Third Girl" (1966) he is forced into contact with the smart set of Chelsea youths. In the growing drug and pop culture of the sixties, he proves himself once again, but has become heavily reliant on other investigators (especially the private investigator, Mr. Goby) who provide him with the clues that he can no longer gather for himself. Notably, during this time his physical characteristics also change dramatically, and by the time Arthur Hastings meets Poirot again in "Curtain", he looks very different from his previous appearances, having become thin with age and with obviously dyed hair.