at the silversmith’s below, before he went up to the old woman and he left him at exactly a quarter to eight. Now just consider...”

“But excuse me, how do you explain this contradiction? They state themselves that they knocked and the door was locked; yet three minutes later when they went up with the porter, it turned out the door was unfastened.”

“That’s just it; the murderer must have been there and bolted himself in; and they’d have caught him for a certainty if Koch had not been an ass and gone to look for the porter too. He must have seized the interval to get downstairs and slip by them somehow. Koch keeps crossing himself and saying: ‘If I had been there, he would have jumped out and killed me with his axe.’ He is going to have a thanksgiving service —