impervious to the sharp probing of the knife.  Again and again I made that circuit, testing each crack, sounding every separate stone in the hope of discovering some slight fault in construction by which I might profit.  Everywhere I was confronted by the same dull, dead wall of cold, hard rock, against which I exerted strength and skill uselessly.  Finally I dropped upon my knees, creeping inch by inch across the floor, but with no better result.  It likewise was composed of great slabs of stone, one having an irregular crack running through it from corner to corner, but all alike solid and immovable.

Then the last faint flicker of hope deserted me.  Yet the exercise of that fruitless search had restored some measure of manhood; my brain no longer throbbed with dull agony, nor did my veins burn as with liquid fire.  I felt convinced this black vault was destined to become my grave; here in after years, perhaps, some straying hunter might uncover my mouldering bones, wondering idly at my unknown story, for here I was surely doomed to face all that was mysterious and terrible in death.  Well, that end must come to me some time, as to all men; I had seen many die, and, although fate faced me in far more horrid guise than any of these others, yet after all it was merely death, and I had no more cause to fear it here in the dark than yonder in the sunshine.  Besides, I retained the keen knife-blade; if worse came to worse that was available for release.  I passed it caressingly through my fingers, wondering would God forgive its use if the moment came when I must choose between insanity and death.

Merciful Heaven! how time dragged!  What awful conceptions were formed in my fevered brain!  What leering, sardonic faces pictured themselves against the black wall; what demon voices spoke and laughed in the void above!  At times I stood in a cave thronged with jeering devils, some with the savage countenance of the heathen, some yet more satanic; yet ever in the midst of their maddest orgies, the cruel mockery of the infamous Naladi appeared more hellish than that of the rest.  She leered down upon me from every side until I seemed to stare into a thousand faces, each wearing her hateful, sardonic smile.

I paced the floor with feverish impatience, counting my steps from wall to wall, hoping by this means to retain control of my brain.  Experiencing the sharp pangs of hunger, I slashed a bit of leather from my belt, and chewed it savagely as a dog might chew a dry bone.  In my despair, I danced, snapping my fingers, and hurling bitter taunts at the unseen upper world.  Exhausted by such useless frenzy, I would sink prone to the floor, every nerve unstrung, lying there panting in helplessness until returning strength again sent me back and forth in that awful tramp from wall to wall.  I perceived that the strain of that horrible haunted silence was driving me mad.  There was no escape, no hope, no peace.  Again and again did I break from incoherent ravings to sink upon my knees, beseeching God for mercy.  Yet I arose without rest, without peace.  At last I sank weakly down against the wall and lay trembling in every limb, staring blindly with wide-open, unseeing eyes.