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