"He must tell us why he went, why he was afraid to sleep in his own room," Graham began.

Robinson held up his hand.

"One question at a time, Mr. Graham. The important thing now is to learn what happened in the room. You're not forgetting Howells, are you?"

Silas Blackburn glanced at the floor. He moved his feet restlessly. He fumbled in his pocket for some loose tobacco. With shaking fingers he refilled his pipe.

"Except for Bobby and Katherine," he quavered, "you don't know what that room means to Blackburns; and they only know by hearsay, because I've seen it was kept closed. Don't see how I'm going to tell you—"

"You needn't hesitate," Robinson encouraged him. "We've all experienced something of the peculiarities of the Cedars. Your return alone's enough to keep us from laughter."

"All right," the old man stumbled on. "I was raised on stories of that room—even before my father shot himself there. Later on I saw Katherine's father die in the big bed, and after that I never cared to go near the place unless I had to. The other night, when I made up my mind to sleep there, I tried to tell myself all this talk was tommyrot. I tried to make myself believe I could sleep as comfortably in that bed as anywhere. So I went in and locked the door and raised the window and lay down."

"You're sure you locked the door?" Robinson asked.

"Yes. I remember turning the key in both doors, because I didn't want anything bothering me from outside."

They all looked at each other, unable to forecast anything of Blackburn's experiences; for both doors had been locked when the body had been found. Granted life, how would it have been possible for Silas Blackburn to have left the room to commence his period of drowsiness? An explanation of that should also unveil the criminal's route in and out.