“Poirot,” I cried, “one day I shall murder you! Your habit of finding everything perfectly simple is aggravating to the last degree!” “But when I explain, mon ami, is it not always perfectly simple?” “Yes; that is the annoying part of it! I feel then that I could have done it myself.” “And so you could, Hastings, so you could. If you would but take the trouble of arranging your ideas! Without method—”

