Crossing the Hill in the direction of the City Postern, the stranger suddenly wheeled round, and, under cover of a low wall, approached the moat. Exactly opposite the Devilin Tower, and the bastion occupying the north-western anglo of the exterior line of fortifications, stood at this time, at a little distance from the moat, a small low building. Towards this structure the stranger hastened. As he drew near it, he glanced uneasily at the ramparts, to ascertain whether he was observed. But though the measured tread of the sentinels and the clank of arms were distinctly audible, he remained unperceived. Unlocking the door, the whole party entered the building, which was apparently deserted. After a moment’s search, the stranger discovered a spring in the floor, which he pulled, and a trap-door opened, disclosing a long and steep flight of steps, at the foot of which sat a man with a mask, bearing a torch. No sooner did this person hear the noise occasioned by the opening of the trap-door, than he hastily ascended, and placed himself in readiness to guide the party. On gaining the level ground, it was evident, from the dampness of the arched roof of the passage, and the slippery surface of the floor along which they trod, that they were far below the bottom of the moat. Traversing this damp dark passage for more than a hundred yards, the humid atmosphere gave place to a more wholesome air, and the ground became drier. Hitherto, the passage had been about three feet wide and seven high, and was arched and flagged with stone. But they had now arrived at a point where it became more lofty, and their further progress was checked by a strong door plated with iron, and studded with nails. Taking a huge key from his girdle, the man in the mask unlocked this ponderous door, and, admitting the party, fastened it behind him. He then led them up another stone stair-case, similar in all respects to the first, except that it did not ascend to more than half the height. This brought them to a vaulted gallery, from which three passages branched. Pursuing that on the right, and preceded by his masked attendant, the stranger strode silently along. As she followed him, Gunnora noticed several strong doors in the wall, which she took to be entrances to dungeons. After threading this passage, the party ascended a third short flight of steps, at the top of which was a trap-door. It was opened by the guide, and admitted them into a small stone chamber, the walls of which appeared, from the embrazures of the windows, to be of immense thickness. The roof was groined and arched. In the centre of the room stood a small table, on which some provisions were placed. A small copper lamp, suspended from the roof, threw a sickly light around, and discovered a little pallet stretched in a recess on the right.