Captain Hastings, Hercule Poirot's Watson, offers a sheaf of his companion's early cases for the delectation of old admirers. Poirot turns his talents to such matters as a murder at a fancy dress ball, a kidnapping that proves to have been a ruse, an unnatural father with a knowledge of chemistry, a rejected suitor with a fatal disease and a wasp's nest in his back yard, and other divertissements, including Poirot's one admitted failure. Even these slim tales offer astute psychological variations along with the detection.