He returned to his bed and lay down again. But still he felt uneasy; again he was impelled to rise. This time he went down into the courtyard. Max was on duty there. The horses were ranged round the walls; the coach stood in the corner to which it had been hauled; everything was as it had been. He went into the large hall: the prisoners were all asleep, the sentry on guard. Something led him to continue his round; he was determined to allay his restlessness by examining every nook and cranny of the castle. Taking a lighted candle, he made his way into the lower part of the keep. He arrived at length at the chamber to which there was access from the tunnel. He started, and stopped short in amazement and consternation. The stones which had been heaped on the trap-door had been removed. With a muttered imprecation on the man who he supposed had carried the stones up the keep for use with the sling, he was turning to order someone to replace them when he noticed that several stones were piled in a corner near at hand. He stood still, puzzled at this strange meddling with his work. At this moment he heard a slight sound beneath him, and saw a tremor in the stone trap-door. Could he believe his eyes? One end of the stone was rising. Quick as thought he blew out his candle, and backing behind a pillar drew a pistol from his belt. His fascinated eyes were fixed on the slowly moving stone. There was now a ray of light at its edge; he heard whispering voices. Steadily the heavy slab was pushed into a vertical position; then appeared the head, the shoulders, the body of a man. By the light of the sputtering candle he carried Harry recognized Otto the landlord. Now he saw the meaning of all that had puzzled him. The man, alarmed for his safety if, as must seem inevitable, the brigands captured the castle and found him there, apparently an accomplice in the trick played upon them, had sought to purchase his peace by leading them through the secret passage. Harry felt a keen pang of self-reproach that he should not have foreseen this development and taken steps to prevent it. [Illustration: Mein Wirth is surprised]