“The mendicant was fully half a mile away from me, but in that clear tropical air was plainly visible; and, fearing that he might look around, I stepped back into the comparative shadow of the gorge and watched.

“Gentlemen, I saw a strange thing. Placing his bundle upon his head, he walked squarely into the face of the waterfall and disappeared!”

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CHAPTER XXXII. STORY OF THE CITY OF FIRE (CONTINUED)

“‘Quitting air, must pass through water.’ The meaning of those words became apparent enough. I stood at the foot of the waterfall, looking up at the fissure from which it issued.

“Although the fact had been most artistically disguised, I could not doubt that this fissure was artificial. A tunnel had been hewn through the rock, and a mountain stream diverted into it. Indeed, on close inspection, I saw that it was little more than a thin curtain of water, partly concealing what looked like the entrance of a cave.

“A great deal of mist arose from it. But I could see that, beyond a ducking, I had little to fear; and, stepping down into the bed of the little stream which frothed and bubbled pleasantly about my bare legs, I set my bundle on my head as the mendicant had done, and plunged through the waterfall, into a place of delicious coolness.

“A strange greenish light prevailed here and directly before me I saw a flight of stone steps leading upward through a tunnel in the rock. By the light of a pocket torch with which I had provided myself, I began to ascend the steps. These, as I have said, were hewn out of the solid rock, and as they numbered something like seven hundred, the labour expended upon the making of this extraordinary staircase must have been stupendous.

“At first the character of the surrounding tunnel suggested that it was, in part at least, a natural cavern. But as I mounted higher and higher, solid masonry appeared in places, some of it displaying unusual carvings, of a character with which I was quite unfamiliar. I concluded that it was very ancient.

“I should explain, gentlemen, that this ascending tunnel zigzagged in a peculiar fashion, which may have been due to the natural formation of the volcanic rock, or may have been part of the design of the original builder. I had ascended more than five hundred steps, and felt that a rest would shortly be necessary, when I reached a sort of cavern, or interior platform, from which seven corridors branched out like the spokes of a wheel. The top of this place was lost in shadows, which the ray of my torch failed to penetrate; and here I paused, setting down my bundle and wondering what my next move should be.