As he surveyed the place in silent wonder, a sullen groan arose from beneath the spot where he stood. His blood ran cold at the sound, but silence returning, and continuing unbroken, he attributed his alarm to the illusion of a fancy, which terror had impregnated. He made another effort to force the door, when a groan was repeated more hollow, and more dreadful than the first. At this moment all his courage forsook him; he quitted the door, and hastened to the stair-case, which he ascended almost breathless with terror. He found Madame de Menon and his sisters awaiting his return in the most painful anxiety; and, thus disappointed in all his endeavours to penetrate the secret of these buildings, and fatigued with fruitless search, he resolved to suspend farther enquiry. When he related the circumstances of his late adventure, the terror of Emilia and Julia was heightened to a degree that overcame every prudent consideration. Their apprehension of the marquis's displeasure was lost in a stronger feeling, and they resolved no longer to remain in apartments which offered only terrific images to their fancy. Madame de Menon almost equally alarmed, and more perplexed, by this combination of strange and unaccountable circumstances, ceased to oppose their design. It was resolved, therefore, that on the following day madame should acquaint the marchioness with such particulars of the late occurrence as their purpose made it necessary she should know, concealing their knowledge of the hidden door, and the incidents immediately dependant on it; and that madame should entreat a change of apartments. Madame accordingly waited on the marchioness. The marchioness having listened to the account at first with surprise, and afterwards with indifference, condescended to reprove madame for encouraging superstitious belief in the minds of her young charge. She concluded with ridiculing as fanciful the circumstances related, and with refusing, on account of the numerous visitants at the castle, the request preferred to her. It is true the castle was crowded with visitors; the former apartments of Madame de Menon were the only ones unoccupied, and these were in magnificent preparation for the pleasure of the marchioness, who was unaccustomed to sacrifice her own wishes to the comfort of those around her. She therefore treated lightly the subject, which, seriously attended to, would have endangered her new plan of delight. But Emilia and Julia were too seriously terrified to obey the scruples of delicacy, or to be easily repulsed. They prevailed on Ferdinand to represent their situation to the marquis.