Marinus Bicknell Willett has no hope that any part of his tale will be believed except by certain sympathetic friends, hence he has made no attempt to tell it beyond his most intimate circle. Only a few outsiders have ever heard it repeated, and of these the majority laugh and remark that the doctor surely is getting old. He has been advised to take a long vacation and to shun future cases dealing with mental disturbance. But Mr. Ward knows that the veteran physician speaks only a horrible truth. Did not he himself see the noisome aperture in the bungalow cellar? Did not Willett send him home overcome and ill at eleven o'clock that portentous morning? Did he not telephone the doctor in vain that evening, and again the next day, and had he not driven to the bungalow itself on that following noon, finding his friend unconscious but unharmed on one of the beds upstairs? Willett had been breathing stertorously, and opened his eyes slowly when Mr. Ward gave him some brandy fetched from the car. Then he shuddered and screamed, crying out, "That beard . . . . those eyes . . . . God, who are you?" A very strange thing to say to a trim, blue-eyed, clean-shaven gentleman whom he had known from the latter's boyhood.