Come to the Cabaret: "Yellow Iris" (1937) by Agatha Christie, on the page and on radio

Agatha Christie's Hercule Poirot short story "Yellow Iris" was first published in The Strand in July 1937. Four months later, on November 2, 1937, "The Yellow Iris" appeared as a play on British radio. It too was written by Christie, who based the play on the prior published story. The story was first published in book form two years later in The Regatta Mystery, a middling collection of Christie short fiction. "Yellow Iris" had one more incarnation, as the plot nucleus of Christie's 1945 mystery novel Sparkling Cyanide. In the United States, this novel was published, somewhat bafflingly, under the title Remembered Death. Three years earlier Christie had published one of her finest novels, Five Little Pigs, a title which her American publisher, Dodd, Mead, had altered to Murder in Retrospect. Both Five Little Pigs and Sparkling Cyanide concerned murders committed in the past, hence the American titles, but somehow Murder in Retrospect to me has more oomph to it than Remembered Death.…