Oliver's only chance was to follow after; accordingly he dropped upon his knees and felt within. For a foot or more the bottom of the space ran upon a line of the floor, then it dropped suddenly and sheerly as the wall of a house. How far it was to the bottom Oliver had no means of knowing. He reached down at arm's-length, but could not touch it. He crawled out of the hole again, and then reversing himself, went in feet foremost. He dropped his legs over the edge of the open space, but still he felt nothing. Upon either side he could touch the sides of the passage with his toes; below, they touched nothing. He dropped himself lower, but still felt nothing. Lower still, and still felt nothing. He let himself go to his arm's-length, and hung there flat against the wall, and felt about with his feet, but still they touched nothing. How far was it to the bottom of that black passage? If he let go his hold, would he be dashed to pieces below? A great wave of fright swept over him, and he struggled vehemently to raise himself up to the edge of the hole again whence he had descended, but he was helpless, powerless. In his frantic struggles his feet clashed against the sides of the passage-way, but he could nowhere gain purchase to raise himself so much as a foot. His struggles grew fainter and fainter, and at last he hung helplessly clinging to the edge of the hole above him with cramped and nervous fingers. A red light seemed to dance before his eyes, and he felt his strength crumbling away from him like undermined earth. He breathed a short prayer, loosed his hold--and fell about six inches to the bottom of the shaft beneath. He crouched there for a while, weak and trembling in the reaction from his terror. At last he heaved a great sigh and wiped the beads of sweat from his forehead with his sleeve. Then, rousing himself and feeling about him, he found that the passage-way continued at right angles with the bottom of the shaft. It seemed to Oliver that he could distinguish a faint gray light in the gloom with which he was enveloped. Nor was he mistaken, for, crawling slowly and painfully forward, he found that the light grew brighter and brighter. Presently the passage took an upward turn, and by-and-by became so steep that Oliver could hardly struggle forward. At last it again became level and easy to traverse; and still the light grew brighter and brighter. Suddenly the passage-way became horizontal again, and Oliver stopped in his forward scrambling, and, sitting helplessly down, began crying; for there in front of him, a few yards distant, the gray light of the fading evening shone in at a square window-like hole, and into it swept the sweet fresh open air, fragrant as violets after the close, dank smell of the rooms he had left.