For a long time we travelled on thus, half an hour I should say, till, after we had descended for many hundreds of feet, I perceived that we were reaching the point of the inverted cone. In another minute we were there, and found that at the very apex of the funnel was a passage, so low and narrow that we had to stoop as we crept along it in Indian file. After some fifty yards of this creeping, the passage suddenly widened into a cave, so huge that we could see neither the roof nor the sides. We only knew that it was a cave by the echo of our tread and the perfect quiet of the heavy air. On we went for many minutes in absolute awed silence, like lost souls in the depths of Hades, Ayesha's white and ghost-like form flitting in front of us, till once more the place ended in a passage which opened into a second cavern much smaller than the first. Indeed, we could clearly make out the arch and stony banks of this second cave, and, from their rent and jagged appearance, discovered that, like the first long passage down which we had passed through the cliff before we reached the quivering spur, it had, to all appearance, been torn in the bowels of the rock by the terrific force of some explosive gas. At length this cave ended in a third passage, through which gleamed a faint glow of light.
I heard Ayesha give a sigh of relief as this light dawned upon us.
"It is well," she said; "prepare to enter the very womb of the Earth, wherein she doth conceive the Life that ye see brought forth in man and beast--ay, and in every tree and flower."
Swiftly she sped along, and after her we stumbled as best we might, our hearts filled like a cup with mingled dread and curiosity. What were we about to see? We passed down the tunnel; stronger and stronger the light beamed, reaching us in great flashes like the rays from a lighthouse, as one by one they are thrown wide upon the darkness of the waters. Nor was this all, for with the flashes came a soul-shaking sound like that of thunder and of crashing trees. Now we were through it, and--oh heavens!
We stood in a third cavern, some fifty feet in length by perhaps as great a height, and thirty wide. It was carpeted with fine white sand, and its walls had been worn smooth by the action of I know not what. The cavern was not dark like the others, it was filled with a soft glow of rose-coloured light, more beautiful to look on than anything that can be conceived. But at first we saw no flashes, and heard no more of the thunderous sound. Presently, however, as we stood in amaze, gazing at the marvellous sight, and wondering whence the rosy radiance flowed, a dread and beautiful thing happened. Across the far end of the cavern, with a grinding and crashing noise--a noise so dreadful and awe-inspiring that we all trembled, and Job actually sank to his knees--there flamed out an awful cloud or pillar of fire, like a rainbow many-coloured, and like the lightning bright. For a space, perhaps forty seconds, it flamed and roared thus, turning slowly round and round, and then by degrees the terrible noise ceased, and with the fire it passed away--I know not where--leaving behind it the same rosy glow that we had first seen.