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
The Regatta Mystery short story." An unnamed reviewer in the "Toronto Daily Star" (30 June 1939) wrote, regarding the title story "The Regatta Mystery", that "Agatha Christie succeeds in baffling her readers ... [B]ut far from plausible is her solution", and went on generally to say, "The author is handicapped by attempting to compress her plots into 27-odd pages each. Nor has she opportunity for continued suspense." The original version of "The Regatta Mystery" featured Hercule Poirot. The story was later rewritten by Christie to change the detective from Poirot to Parker Pyne for book publication and all collections in both the US