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 advantage to him later. To make a success of humanity, Georges, we must profit by the lessons of those below us in the animal kingdom. I have always done so. I have been the cat, watching at the mouse hole. I have been the good dog following up the scent, and not taking my nose from the trail. And also, my good Georges, I have been the squirrel. I have stored away the little fact here, the little fact there. I go now to my store and I take out one particular nut, a nut that I stored away—let me see, seventeen years ago. You follow me, Georges?"

"I should hardly have thought, sir," said George, "that nuts would have kept so long as that, though I know one can do wonders with preserving bottles."

Poirot looked at him and smiled.