“Well, he told me to wait up, and I was dozing in the next room to the study—the dining-room—when the ‘phone bell aroused me. I heard the lieutenant—Mr. Slattin, coming out, and I ran out too, but only in time to see him taking his hat from the rack—”

“But he wears no hat!”

“He never got it off the peg! Just as he reached up to take it, he gave a most frightful scream, and turned around like lightning as though some one had attacked him from behind!”

“There was no one else in the hall?”

“No one at all. I was standing down there outside the dining-room just by the stairs, but he didn’t turn in my direction, he turned and looked right behind him—where there was no one—nothing. His cries were frightful.” Burke’s voice broke, and he shuddered feverishly. “Then he made a rush for the front door. It seemed as though he had not seen me. He stood there screaming; but, before I could reach him, he fell....”

Nayland Smith fixed a piercing gaze upon Burke.

“Is that all you know?” he demanded slowly.

“As God is my judge, sir, that’s all I know, and all I saw. There was no living thing near him when he met his death.”

“We shall see,” muttered Smith. He turned to me—“What killed him?” he asked, shortly.

“Apparently, a minute wound on the left wrist,” I replied, and, stooping, I raised the already cold hand in mine.