As I went on, the precipices rose higher and seemed to overhang, the channel grew narrower, the light grew fainter, until at last all around me grew dark. I was floating at the bottom of a vast chasm, where the sides seemed to rise precipitously for thousands of feet, where neither watery flood nor rocky wall was visible, and where, far above, I could see the line of sky between the summits of the cliffs, and watch the glowing stars. And as I watched them there came to me the thought that this was my last sight on earth, and I could only hope that the life which was so swiftly approaching its end might live again somewhere among those glittering orbs. So I thought; and with these thoughts I drifted on, I cannot tell how long, until at length there appeared a vast black mass, where the open sky above me terminated, and where the lustre of the stars and the light of the heavens were all swallowed up in utter darkness.
This, then, I thought, is the end. Here, amid this darkness, I must make the awful plunge and find my death I fell upon my knees in the bottom of the boat and prayed. As I knelt there the boat drew nearer, the black mass grew blacker. The current swept me on. There were no breakers; there was no phosphorescent sparkle of seething waters, and no whiteness of foam. I thought that I was on the brink of some tremendous cataract a thousand times deeper than Niagara; some fall where the waters plunged into the depths of the earth; and where, gathering for the terrific descent, all other movements—all dashings and writhings and twistings—were obliterated and lost in the one overwhelming onward rush. Suddenly all grew dark—dark beyond all expression; the sky above was in a moment snatched from view; I had been flung into some tremendous cavern; and there, on my knees, with terror in my heart, I waited for death.
The moments passed, and death delayed to come. The awful plunge was still put off; and though I remained on my knees and waited long, still the end came not. The waters seemed still, the boat motionless. It was borne upon the surface of a vast stream as smooth as glass; but who could tell how deep that stream was, or how wide? At length I rose from my knees and sank down upon the seat of the boat, and tried to peer through the gloom. In vain. Nothing was visible. It was the very blackness of darkness. I listened, but heard nothing save a deep, dull, droning sound, which seemed to fill all the air and make it all tremulous with its vibrations. I tried to collect my thoughts. I recalled that old theory which had been in my mind before this, and which I had mentioned to Agnew. This was the notion that at each pole there is a vast opening; that into one of them all the waters of the ocean pour themselves, and, after passing through the earth, come out at the other pole, to pass about its surface in innumerable streams. It was a wild fancy, which I had laughed at under other circumstances, but which now occurred to me once more, when I was overwhelmed with despair, and my mind was weakened by the horrors which I had experienced; and I had a vague fear that I had been drawn into the very channel through which the ocean waters flowed in their course to that terrific, that unparalleled abyss. Still, there was as yet no sign whatever of anything like a descent, for the boat was on even keel, and perfectly level as before, and it was impossible for me to tell whether I was moving swiftly or slowly, or standing perfectly still; for in that darkness there were no visible objects by which I could find out the rate of my progress; and as those who go up in balloons are utterly insensible of motion, so was I on those calm but swift waters.
At length there came into view something which arrested my attention and engrossed all my thoughts. It was faint glow that at first caught my gaze; and, on turning to see it better, I saw a round red spot glowing like fire. I had not seen this before. It looked like the moon when it rises from behind clouds, and glows red and lurid from the horizon; and so this glowed, but not with the steady light of the moon, for the light was fitful, and sometimes flashed into a baleful brightness, which soon subsided into a dimmer lustre. New alarm arose within me, for this new sight suggested something more terrible than anything that I had thus far thought of. This, then, I thought, was to be the end of my voyage; this was my goal—a pit of fire, into which I should be hurled! Would it be well, I thought, to wait for such a fate, and experience such a death-agony? Would it not be better for me to take my own life before I should know the worst? I took my pistol and loaded it, so as to be prepared, but hesitated to use it until my fate should be more apparent. So I sat, holding my pistol, prepared to use it, watching the light, and awaiting the time when the glowing fires should make all further hope impossible. But time passed, and the light grew no brighter; on the contrary, it seemed to grow fainter. There was also another change. Instead of shining before me, it appeared more on my left. From this it went on changing its position until at length it was astern. All the time it continued to grow fainter, and it seemed certain that I was moving away from it rather than toward it. In the midst of this there occurred a new thought, which seemed to account for this light—this was, that it arose from these same volcanoes which had illuminated the northern sky when I was ashore, and followed me still with their glare. I had been carried into this darkness, through some vast opening which now lay behind me, disclosing the red volcano glow, and this it was that caused that roundness and resemblance to the moon. I saw that I was still moving on away from that light as before, and that its changing position was due to the turning of the boat as the water drifted it along, now stern foremost, now sidewise, and again bow foremost. From this it seemed plainly evident that the waters had borne me into some vast cavern of unknown extent, which went under the mountains—a subterranean channel, whose issue I could not conjecture. Was this the beginning of that course which should ultimately become a plunge deep down into some unutterable abyss? or might I ever hope to emerge again into the light of day—perhaps in some other ocean—some land of ice and frost and eternal night? But the old theory of the flow of water through the earth had taken hold of me and could not be shaken off. I knew some scientific men held the opinion that the earth's interior is a mass of molten rock and pent-up fire, and that the earth itself had once been a burning orb, which had cooled down at the surface; yet, after all, this was only a theory, and there were other theories which were totally different. As a boy I had read wild works of fiction about lands in the interior of the earth, with a sun at the centre, which gave them the light of a perpetual day. These, I knew, were only the creations of fiction; yet, after all, it seemed possible that the earth might contain vast hollow spaces in its interior—realms of eternal darkness, caverns in comparison with which the hugest caves on the surface were but the tiniest cells. I was now being borne on to these. In that case there might be no sudden plunge, after all. The stream might run on for many thousand miles through this terrific cavern gloom, in accordance with natural laws; and I might thus live, and drift on in this darkness, until I should die a lingering death of horror and despair.
There was no possible way of forming any estimate as to speed. All was dark, and even the glow behind was fading away; nor could I make any conjecture whatever as to the size of the channel. At the opening it had been contracted and narrow; but here it might have expanded itself to miles, and its vaulted top might reach almost to the summit of the lofty mountains. While sight thus failed me, sound was equally unavailing, for it was always the same—a sustained and unintermittent roar, a low, droning sound, deep and terrible, with no variations of dashing breakers or rushing rapids or falling cataracts. Vague thoughts of final escape came and went; but in such a situation hope could not be sustained. The thick darkness oppressed the soul; and at length even the glow of the distant volcanoes, which had been gradually diminishing, grew dimmer and fainter, and finally faded out altogether. That seemed to me to be my last sight of earthly things. After this nothing was left. There was no longer for me such a thing as sight; there was nothing but darkness—perpetual and eternal night. I was buried in a cavern of rushing waters, to which there would be no end, where I should be borne onward helplessly by the resistless tide to a mysterious and an appalling doom.
The darkness grew so intolerable that I longed for something to dispel it, if only for a moment. I struck a match. The air was still, and the flame flashed out, lighting up the boat and showing the black water around me. This made me eager to see more. I loaded both barrels of the rifle, keeping my pistol for another purpose, and then fired one of them. There was a tremendous report, that rang in my ears like a hundred thunder-volleys, and rolled and reverberated far along, and died away in endless echoes. The flash lighted up the scene for an instant, and for an instant only; like the sudden lightning, it revealed all around. I saw a wide expanse of water, black as ink—a Stygian pool; but no rocks were visible, and it seemed as though I had been carried into a subterranean