He did move, and a bullet ripped into a picture just behind him. With an oath he stood perfectly still. A door had opened across the room and a girl stood there. It was Joan Perry. "I missed you on purpose," she said. "I shall not miss a second time. Cut those ropes." For a moment he stood still, then he moved again, but not with the intention of setting me free; the next instant he stumbled, as if his leg had suddenly given way, and he let out a savage oath. "To show you I do not miss," said the girl. "Cut those ropes, or the third bullet finds your heart." Sir Michael took a knife from his pocket, and the girl came a little closer, but not near enough to give him a chance of grabbing at her. Her calm deliberation was wonderful. "Do more than cut the ropes and you are a dead man," she said. The instant my arms were free I had the gag from my mouth and could do something in my own defense. I was quickly on my feet. "Keep him covered," I said to Perry. "I think we change places, Sir Michael." Physically he was not a powerful man, and with Joan Perry near him he seemed to have lost his nerve. Her courage had shaken him badly, and he made no resistance. I was not long in having him bound and handcuffed. "I have to thank you," I said, turning to the girl. "Not yet. There is more to do. Mrs. Reville is in it, and Mr. Quarles has no doubt been caught in the grounds, as he said. I will ring. The servants are honest, and I expect Mr. Saunders is in the house by now. He usually comes up in the evening." Fortunately Mrs. Reville had not heard the revolver shots, or she might have given the alarm to the two men who had secured the professor in the ruins, and they would very probably have killed him. I took the lady by strategy. I sent a servant to tell her that Sir Michael wished to speak to her, a summons which she had evidently been expecting, and I secured her as she came down the stairs. Then, leaving her and Sir Michael in charge of Perry and Saunders and a footman, I went with other servants to rescue Quarles. We took the confederates in the ruins by surprise, but in my anxiety that no harm should come to the professor, who was bound just as I had been, they managed to get away. Now that he was captured, Sir Michael Lavory's pluck entirely deserted him, and he told us where to find his niece. She was in a secret chamber under a tower in the ruins. She had been caught that night at the end of the terrace by Sir Michael's accomplices, had been rendered unconscious by chloroform, and taken to the tower.