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
Death in the Clouds doors of a library, but the combination of poisoned dart and plane is probably unique. Not that such minor matters are of the slightest consequence to the reader; the main thing is that this is an Agatha Christie story, featuring Hercule Poirot, who is, by his own admission, the world's greatest detective." He concluded, "This is a crime puzzle of the first quality, and a mighty entertaining story besides." In "The Observer"'s issue of 30 June 1935, "Torquemada" (Edward Powys Mathers) started his review, "My admiration for Mrs. Christie is such that with each new book of hers I strain