I made haste to cast away the undergarment with its coating of black lead and resume my clothing; then stooping down, I made an examination of the floor. It was composed of huge blocks of marble of various colors, polished almost as smooth as if the hand of man had wrought the work and then I knew that I was on Nature's Marble Highway leading to the cities of the under world which Don Fum had mentioned in his book, and I remembered, too, that he had spoken of Nature's Mighty Mosaics, huge fantastic figures on the walls of these lofty corridors, made up of various colored blocks and fragments laid one upon the other as if with design, and not by the wild, tempestuous whims of upbursting forces thousands of years ago, when the earth was in its mad and wayward youth. After a rest of several hours, during which I nursed my torn hands and bruised fingers, Bulger and I were up and off again along this broad and glorious Marble Highway. Strange to say, it was not the inky darkness of the ordinary cavern which filled these magnificent chambers, through which the Marble Highway went winding in stately and massive grandeur; far from it. The gloom was tempered by a faint glow that met us on the way ever and anon, like a ray of twilight gone astray. Anyway, Bulger, I noticed, could see perfectly well; so tying a bit of twine to his collar, I sent him on ahead, convinced that I could have no surer guide.
At times our path would be lighted up for an instant by the bursting-out of a little tongue of flame either on the sides or from the roof of the gallery. I was puzzled for quite a while to tell what it proceeded from; but at last I caught sight of the source, or rather the maker, of this welcome illumination. It proceeded from a lizard-like animal, which, by suddenly uncoiling its tail, had the power to emit this extremely bright flash of phosphorescent light, and in so doing he made a sharp crack, for all the world like the noise of an electric spark. Bulger was delighted with this performance and on one occasion, not being able to control his feeling, he uttered a sharp bark, whereupon apparently ten thousand of these little torch-bearers
