Hercule Poirot available to solve mysteries at an English country house. At the time of Christie's writing, it was considered patriotic to express sympathy towards the Belgians, since the invasion of their country had constituted Britain's "casus belli" for entering World War I, and British wartime propaganda emphasised the "Rape of Belgium". Poirot first appeared in "The Mysterious Affair at Styles" (published in 1920) and exited in "Curtain" (published in 1975). Following the latter, Poirot was the only fictional character to receive an obituary on the front page of "The New York Times". By 1930, Agatha Christie found Poirot "insufferable", and, by
Hercule Poirot often misleading about his past to gain information, the truthfulness of that statement is unknown; it does however scare off a would be killer of his wife. In the short story "The Chocolate Box" (1923), Poirot reveals to Captain Arthur Hastings an account of what he considers to be his only failure. Poirot admits that he has failed to solve a crime "innumerable" times: I have been called in too late. Very often another, working towards the same goal, has arrived there first. Twice I have been struck down with illness just as I was on the point of success.