"Who was the lady?" he asked at last.

"I forget her name, sir. She was the lady who—who fainted in the ball-room, sir, just a few minutes ago."

Whatever emotion may have been aroused within Mr. Grimm it certainly found no expression in his face. When he spoke again his voice was quite calm.

"Miss Thorne, perhaps?"

"Yes, sir, that's the name—Miss Thorne. I was in the ladies' dressing-room when she was brought in, sir, and I remember some one called her name."

Mr. Grimm took the girl, still a-quiver with excitement, and led her along the hall to where Gray stood.

"Take this girl in charge, Gray," he directed. "Lock her up, if necessary. Don't permit her to say one word to anybody—anybody you understand, except the chief."

Mr. Grimm left them there. He passed along the hall, glancing in each room as he went, until he came to a short flight of stairs leading toward the kitchen. He went on down silently. The lights were burning, but the place was still, deserted. All the servants who belonged there were evidently, for the moment, transferred to other posts. He passed on through the kitchen and out the back door into the street.

A little distance away, leaning against a lamp-post, a man was standing. He might have been waiting for a car. Mr. Grimm approached him.

"Beg pardon," he said, "did you see a woman come out of the back door, there?"