The blow which he received rendered him instantly unconscious, and it was hours later before he came to himself. His first knowledge of the world and things in general was a realisation that in some mysterious way the entire firmament was divided in half by a black band, and it was only as his brain became a little clearer that he realised that he was lying on his back looking up at the rim of the well. He sat up, and examined himself critically. He had evidently cut his head slightly, for it was still bleeding. Moreover, he was black and blue from head to foot, but he was rejoiced to find, after a careful examination, that no bones were broken, nor had he even suffered a sprain, and in a few moments he was able to stand upright. His position, however, was none the less precarious. The breaking of the chain had ended for ever any chance of his ascending the tower, and he must either effect an entrance through the roof or depend on the very uncertain chance of attracting notice from without, to escape starvation. Lying face down on the floor of the roof, he tried to look out of the little holes in the mouths of the gargoyles, but could see nothing, and from the appearance of the sky over his head, he judged that it must be growing dark. This reminded him of his bicycle lamp, which a hasty examination proved to be intact, and feeling that he would at least have light for his investigations, was a great source of comfort to him. His next procedure was to examine the roof. Here, fate once more befriended him, for he very quickly found a trap-door and, moreover, was able to lift it. Looking down he could see nothing but utter darkness. However, this did not deter him, and he hastily made his arrangements for further investigation, first taking the precaution to light a match and drop it into the opening. It fell, about ten or twelve feet, evidently striking the floor and burning there a minute or two before it went out. It revealed nothing but surrounding darkness, but it apprised him of the fact he was most desirous to know, that the atmosphere was not mephitical. He determined, nevertheless, to take his time about descending, and left the trap-door wide open, so that as much fresh air might get in as possible. In the interval he amused himself by taking off one of his socks and unravelling it as best he could. Weaving a cord with the thread thus obtained, he lowered his bicycle lantern, which he had lighted, into the room below, swinging it gently back and forwards. Its glancing rays told him that the apartment was entirely bare and deserted, and showed him also a narrow wooden ladder, black with age, leading up to the trap-door above which he stood. Drawing up the light, he took it in his hand, and being cautious after his recent experience, reached down and tested each round of the ladder most carefully. To his surprise it held his weight, and a moment later he was on the floor of the secret chamber.