When Ferdinand learned the circumstances relative to the southern side of the castle, his imagination seized with avidity each appearance of mystery, and inspired him with an irresistible desire to penetrate the secrets of his desolate part of the fabric. He very readily consented to watch with his sisters in Julia's apartment; but as his chamber was in a remote part of the castle, there would be some difficulty in passing unobserved to her's. It was agreed, however, that when all was hushed, he should make the attempt. Having thus resolved, Emilia and Julia waited the return of night with restless and fearful impatience. At length the family retired to rest. The castle clock had struck one, and Julia began to fear that Ferdinand had been discovered, when a knocking was heard at the door of the outer chamber. Her heart beat with apprehensions, which reason could not justify. Madame rose, and enquiring who was there, was answered by the voice of Ferdinand. The door was cheerfully opened. They drew their chairs round him, and endeavoured to pass the time in conversation; but fear and expectation attracted all their thoughts to one subject, and madame alone preserved her composure. The hour was now come when the sounds had been heard the preceding night, and every ear was given to attention. All, however, remained quiet, and the night passed without any new alarm. The greater part of several succeeding nights were spent in watching, but no sounds disturbed their silence. Ferdinand, in whose mind the late circumstances had excited a degree of astonishment and curiosity superior to common obstacles, determined, if possible, to gain admittance to those recesses of the castle, which had for so many years been hid from human eye. This, however, was a design which he saw little probability of accomplishing, for the keys of that part of the edifice were in the possession of the marquis, of whose late conduct he judged too well to believe he would suffer the apartments to be explored. He racked his invention for the means of getting access to them, and at length recollected that Julia's chamber formed a part of these buildings, it occurred to him, that according to the mode of building in old times, there might formerly have been a communication between them. This consideration suggested to him the possibility of a concealed door in her apartment, and he determined to survey it on the following night with great care. CHAPTER III