Lanagan’s clothes had that peculiarly hand-dog appearance that the newest suit will get when a man has slept in it once or twice; and Lanagan’s clothes were seldom new, so the appearance was emphasised. He had evidently found no time either to shave or change his collar. Worn lines were about his mouth and eyes such as you see in athletes who have “pulled off” weight in hard training. But his eyes, those dark, mesmeric eyes, were sparkling and the old engaging trick of smiling was there.

“Began to think maybe I had ‘lost my grip,’” he said, with a short laugh. “But I have either turned up one of the finest police stories in my time or I have gone plumb crazy. We will soon know.”

Without more words, he walked quickly several blocks down over the eastern slope of the hill and turned into a narrow tradesman’s alley. I noticed that he was watching keenly before and after us. He slipped through a gate in a high board fence and we were in a yard overgrown with shrubbery and weeds. The house was a corner one and of that familiar type of old family residence, seen in most localities, that has gone to seed on a mortgage. It was vacant. He opened the kitchen door with a skeleton key and we walked upstairs, turning into a large room commanding a view of the street. He kept away from the window, I noticed.

“Draw up the Morris chair,” he said facetiously, as he squatted on his legs. I sat down against the wall and pulled out a cigar but he stopped me.

“Can’t take a chance. Smell of smoke might give the whole thing away. See anything curious about this room?”

I looked at the bareness of it and shook my head.

“Examine it,” he said. “You haven’t even looked it over.”

I knew he was not given to joking, so I got up and went over the room carefully. The door to the hall was swung back against the wall and I closed it.

Hanging on the door knob by the leather wrist thong was a blackjack, a duplicate of the one with which Ratto was slain. Lanagan was laughing quietly.

“What are your sensations at being in a prospective death chamber?” he asked.