It must have been the shock of thus realizing suddenly how short a time remained in which I should have light which restored my senses. I know I stared at the dim yellow flicker dully at first, and then with a swift returning consciousness which spurred my brain into activity. In that instant I hated, despised myself, rebelled at my weakness. Faith in Claire Mortimer came back to me in a flood of regret. If she had failed, it was through no fault of hers, and I was no coward to lie there and rot without making a stern fight for life. When I was found, those who came upon my body would know that I died struggling, died as a man should, facing fate with a smile, with hands gripped in the contest. The resolution served--it was a spur to my pride, instantly driving away every haunting shadow of evil. Yet where should I turn? To what end should I devote my energies? It was useless to climb those stairs again. But there must be a way out. It was impossible to conceive that the old-time Mortimer--the stern frontiersman who had built this refuge from possible Indian attack--had made merely a hole in which to hide. That would have been insanity, for, with the house above aflame, he would have been cooked to a crisp. No! that was inconceivable; there must have originally been an exit somewhere. But where? And if discovered would it be found choked by the _debris_ of a century, a mere _cul de sac_? Surely none of this present generation knew the existence of any such passage. Yet it was the single desperate chance remaining, and I dare not let doubt numb my faculties. I gripped the old musket as the only instrument at hand, and began testing the walls. Three sides I rapped, receiving the same dead, dull response. I was in the darkest corner now, beyond the stairs, still hopelessly beating the gun barrel against the stone. The dim light revealed no change in the wall formation, the same irregular expanse of rubble set in solid mortar, hardened by a century of exposure to the dry atmosphere. Then to an idle, listless blow there came a hollow, wooden sound, that caused the heart to leap into the throat. I tried again, a foot to the left, confident my ears had played me false, but this time there could be no doubt--there was an opening here back of a wooden barrier.