"There was only a shaded reading-lamp alight, and it stood on a chair, shining right down on him; it made a patch of light on the floor, you understand." The Inspector indicated its extent with his hands. "Well, as the man smashed the glass and got the window open, and was just climbing in, he saw something else, so he says."

He paused.

"What did he see?" demanded Smith shortly.

"A sort of GREEN MIST, sir. He says it seemed to be alive. It moved over the floor, about a foot from the ground, going away from him and towards a curtain at the other end of the study."

Nayland Smith fixed his eyes upon the speaker.

"Where did he first see this green mist?"

"He says, Mr. Smith, that he thinks it came from the mummy case."

"Yes; go on."

"It is to his credit that he climbed into the room after seeing a thing like that. He did. He turned the body over, and Sir Lionel looked horrible. He was quite dead. Then Croxted—that's the man's name—went over to this curtain. There was a glass door—shut. He opened it, and it gave on a conservatory—a place stacked from the tiled floor to the glass roof with more rubbish. It was dark inside, but enough light came from the study—it's really a drawing-room, by the way—as he'd turned all the lamps on, to give him another glimpse of this green, crawling mist. There are three steps to go down. On the steps lay a dead Chinaman."

"A dead Chinaman!"