The Man from the Sea — Agatha Christie

Previously published in the print anthology The Mysterious Mr. Quin.

Mr. Satterthwaite has moved to a Mediterranean island, where he encounters Anthony Cosden just as Cosden is about to leap to his death. Apparently this was not Cosden's first attempt; only yesterday he had been stopped from jumping by Harley Quin. Can they bring happiness back to the poor man's life?