"Straight as far as it goes," was the reply, "but maybe that guard back in the ell saw the lady afore we come up."

"What guard?"

"One o' your fellows," said the corporal. "Anyhow he had his buttons cut off. I guess he's there yet."

I was out into the hall as quickly as I could turn, Conroy and the major following closely. A dozen steps took us beyond the chimney jog, and to the top of the back stairs. There was no one there. The side doors stood open, and the narrow hallway was vacant. My eyes met the corporal's.

"Well, I'll be jiggered," he exclaimed. "He was right there by the second door when I saw him. I was goin' to post Murphy at that end window, sir, but I didn't think there was any need o' two men there."

"Did you speak to him?"

"I told him what was up, sir, and that he better stay by the window."

"Did he answer you?"

"He said 'all right,' or something like that, an' went back. I never thought anything was wrong; all I noticed particular was he had only a revolver, but most o' yer fellows was armed that way. I meant to get him a gun as soon as I had time." He strode forward, looking into the rooms. "He ain't here now anyhow, and I'm damned if I know where he could o' gone. Did I make a mistake, sir?"

"No, this is no fault of yours, Corporal, but it's strange nevertheless. We had no guard up here, but this fellow, wearing our uniform, has been seen before--Miss Hardy, this gentleman's daughter, saw him, and now she has disappeared. There was murder done in this hall this morning."