And now before him lay this passageway. He was resolved to explore it as far as possible, so as to unfold the mystery. But who was this visitor?—a woman! Was she friend or foe? If a foe, why had she come? What did she expect, or why had she spoken so gently and roused him so quietly? If a friend, why had she fled so hurriedly, without a sign or word? The more he thought it over, the more he felt convinced that his visitor had made a mistake; that she had come expecting to find some one else, and had been startled at the discovery of her mistake. Perhaps Mrs. Russell had bribed one of the Carlist women to carry a message to her husband. That seemed the most natural way of accounting for it.

It was evident to Harry that this passage-way was known, and was used; that he was at the mercy of his captor; and that Russell had made a great blunder in hiding his package in such a place. But why had his visitor failed to discover the package? Perhaps because she came in the dark. That would account for it. She could not have seen it; she passed by it thus, both while coming and going.

Nevertheless, whether this passage was known and used by others or not, Harry could not help feeling that its discovery was a great thing for him. Perhaps it might lead out of the castle. That meant escape, liberty, life! It meant more. Once outside, he felt that he could obtain help from some quarter. He would then come back with a force which would be sufficient to capture the castle and free his friends; or, if he could not gather a large force, he might find at least a small band of men with whom he could steal in through this secret passage, and effect the rescue of his friends in that way. And by "his friends" he meant Katie. She, at least, could be rescued, and the best way would be to rescue her at the outset by carrying her off with him. Such were Harry's hopes and intentions.

In entering now upon this exploration, Harry felt the great necessity that there was of caution; and yet, in spite of this, the torch would have to be retained, or else any farther progress would be impossible. To crawl along in the dark might be safer, but it would effect nothing, and he could only hope that his torch-light would not be observed. Dangerous or not, he must retain it; and besides, he could not be in any greater peril than he had already been in. By this bold move, he had everything to gain and nothing to lose. There was, however, one other precaution which he would have to take, and that was to make as little noise as possible. His heavy boots would never do, and the sound might pass through even such walls as these. Removing these, therefore, he carried them under one arm, and, holding the torch in his unoccupied hand, he advanced along the passage.

The stones were cold to his feet as he started on his adventurous way. Slowly, cautiously, stealthily, he moved along. The passage was about six feet in height and two feet wide, with massive stone-walls on either side. By its direction, it seemed to pass through the wall at one end of the great hall, past the place where the stairway ascended from below. Along this Harry moved noiselessly and watchfully, and at length came to a place where the passage-way turned at right angles, just as it had done at the entrance. Up this he walked, and, after a few paces, perceived an abyss before him. In an instant he understood what this was. It was another chimney similar to the one in his room, from which the passage-way had started, and here too, doubtless, there was a room like his own.

He now extinguished the torch, which, together with the boots, he put down on the floor, and then, lying flat down, he thrust his head over the opening and tried to see what was below. There was a faint light, the light of moonbeams, which streamed in here and fell upon the floor, just as in his own room. He reached down his hand, and could feel that here too there were stepping-stones. In fact, there were two rooms connected by this passage-way, and in all probability they were exactly similar. But who were in this room? The men had been taken to one side of the great hall, the women to the other. Were the women here? Were they by themselves? And was Katie here? Would it be possible for him to go down so as to try to communicate with any of them? It was certainly hazardous. A discovery would ruin all. It would be better to wait, at any rate to watch here for a while, and listen.

As he watched he could see somewhat better, for his eyes grew more accustomed to the dim light. He could make out the stepping-stones, and the chimney floor, and the floor of the room for about one-third of the distance from the chimney. As he lay there and watched and listened, there came to his ears, through the deep stillness of night, the sound of regular breathing, as of sleepers, together with an occasional sigh, as of some one in a troubled dream. They were all asleep, then! Who? The Carlists, or the women attendants? or was it not rather his own friends—and—Katie? At this thought an uncontrollable desire seized him to venture down and see for himself. He might get near enough to see for himself. He could strike a match, take one look, and then, if mistaken, retreat. Dared he venture? He dared.

He raised himself, and then was about to put one foot down so as to descend, but at that very moment, as he stood poised in that attitude, he heard a faint shuffling sound below. He stopped and looked down cautiously. There, across the moonbeams, he could see a figure moving; the very same figure that he had seen moving across the moonbeams in his own room—the same slender, slight, fragile figure, with the same floating, vaporous drapery. But now he did not feel one particle of wonder or superstitious awe. He understood it all. The woman who had visited him had fled back here, and was now about to return. What should he do? He must retreat. She was evidently coming in his direction. He would go back to his own room, and wait and watch and intercept her. As Harry hesitated the woman stopped also, and listened. Then she advanced again.

Upon this Harry retreated, taking his boots and the extinguished torch, and went back again. He succeeded in regaining his own room without making any noise, and by that time he had decided on what he ought to do. He decided to stand in the fireplace, on the opposite side. The woman would come down the stepping-stones and steal into the room: he would Watch her and find out what she wanted. Then he would act according to the issue of events; and at any rate he could intercept her on her return, and make her give an account of herself.

Having come to this conclusion, Harry stood there in the chimney, waiting most patiently for what seemed a very long time. He suspected that the woman might still be hesitating, but determined to wait until she should make her appearance. At length he heard a noise, which seemed to come from the passage above. It was a soft, dull, scraping, sliding noise of a very peculiar kind, the cause and the nature of which he could not conjecture. The sound came, and then stopped, and came again, and again stopped, for three or four times. Harry listened and waited. At last the sound ceased altogether, and there was the same stillness as before.