During this eager and hazardous attack, on the eastern side of the castle, the captive Drost Aagé stood before the iron-grated loophole in the square upper tower, which rose from the middle of the principal western wing of the castle. Far below, perpendicularly from the prison grating, the great wooden staircase projected into the castle court, from which, through a balcony, was the entrance into the vestibule of the upper story. The prison tower was separated from the besieged gate by the two principal wings to the north and south of the circular court, by the ladies' apartment, and the knights' hall. From his high prison grating Aagé was thus enabled to witness the combat and strenuous efforts, as well of the assailants as of the besieged. He had succeeded in climbing up into the recess in the wall within the grating, whence he looked out with steadfast gaze and throbbing heart over the castle yard towards the tower gate. Here he knew the principal attack was to be made. He had for some time heard the din of the fight, and perceived how all the forces combined to assault and defend this one point. He now beheld the dense pillar of smoke rising without the gate, and observed at the same time, through the loopholes of the tower, that the garrison were putting their largest machines of defence in motion in order to crush the besiegers with stones and beams, ere they could succeed in firing the gate. "Must I stand passive here, while the king is in battle and danger?" exclaimed Aagé, as he shook the iron gate in wrath. He had nearly fallen down backwards into his prison, as a fragment of the ancient wall loosened and fell in before him, together with a part of the grating. "A hint!" he exclaimed in surprise; "thanks be to thee, my good angel! thou art, then, more powerful than the Evil One." He instantly conceived the design of availing himself of this accident to make a venturous flight from the tower, in the hope of hastening to the assistance of the besiegers, and perhaps of opening the gate to them. He bound his shoulder scarf to that part of the grating which remained firm, and made preparations for letting himself down to a lower shelf of the tower wall; but at this moment he heard a voice, which constrained him to draw back, and filled him with dismay. He had leaned his head against a pillar of the tower, which being raised the whole height of the building conducted the sound to his ear from an unfathomable depth. Directly under him, where the high wooden staircase projected, was a deep vault with a well, concealed under the uppermost landing, which led through the balcony to the great vestibule of the castle. This vault, with its deep well, was, in cases of emergency, the last defence of the castle, and might prove a frightful grave for every besieger who was not aware of the contrivance, as in the landing of the stairs was a concealed trap-door, which could suddenly be let down from within to plunge the entering foe