Collins, London, 1926. First edition, a variant, probably a later issue. Pale blue binding with the title in black on the spine and upper cover. Copyright dated 1926 on the verso of the title page, and the blurb facing the title page as with the more common darker blue binding. The binding is a bit scuffed at the edges, with some spotting to the edges of the text block, no markings or inscriptions. Beautifully presenting in a facsimile dust wrapper and custom made clamshell box. One of Chistie’s most desirable titles, her third Poirot title and breakthrough novel, uncommon in this condition