original shorter version was first printed in book form in the UK in two obscure collections Problem at Pollensa Bay and Christmas Adventure (Todd 1943) and Poirot Knows the Murderer (Polybooks 1946) and it was reprinted in book form in the UK collection While the Light Lasts and Other Stories in 1997 under the title "Christmas Adventure". The expanded version appeared after publication of the book in the weekly magazine Women's Illustrated from 24 December 1960 to 7 January 1961 under the alternative title of "The Theft of the Royal Ruby" with illustrations by Zelinksi. The story first appeared in the US in Double Sin and Other Stories in 1961 also under the title of "The Theft of the Royal Ruby" with some slight revisions to the UK version. The original shorter version has so far not been published in the US. US book appearances of stories "The Mystery of the Baghdad Chest" (the earlier version of "The Mystery of the Spanish Chest") and "The Dream" appeared in The Regatta Mystery. "The Under Dog" appeared in The Under Dog and Other Stories. "Four-and-Twenty Blackbirds" appeared in Three Blind Mice and Other Stories. See also List of Christmas-themed literature References External links The Adventure of the Christmas Pudding at the official Agatha Christie website 1960 short story collections Hercule Poirot short story collections Miss Marple short story collections Short story collections by Agatha Christie Collins Crime Club books