mysterious glow would return, beginning with the softest yellow, then changing through a dozen different tints, and, like a fickle maid uncertain which to wear, put all aside and don the lily's garb. Bulger and I wandered along the Marble Highway almost afraid to break a stillness so deep that it seemed to me as if I could hear those sportive rays of light in their play against the many-colored rocks arching this mighty corridor.
Now, as the Marble Highway swept around in a graceful curve, a dazzling flood of light burst upon us.
It was sunrise in the World within a World.
Whence came this flood of dazzling light which now caused the sides and arching roof to glow and sparkle as if we had suddenly entered one of Nature's vast storehouses of polished gems? Shading my eyes with my hand I looked about me in order to try and solve the mystery.
It did not take me long to understand it all. Know then, dear friends, that the ceilings, domes, and arched roofs of this underground world were fretted with a metal of greater hardness than any known to us children of sunshine. Its seams ran hither and thither like the veins of gigantic leaves; and at certain hours currents of electricity from some vast internal reservoir of Nature's own building, streamed through these metal traceries until they glowed with a heat so white as to give off the flood of dazzling light of which I have already spoken.
The current never came with a sudden rush or burst, but began gently and timidly, so to speak, as if feeling its way along. Hence the beautiful tints that always preceded sunrise in this lower world, and made it so much like the coming and going of our glorious sunshine.
The Marble Highway now divided, and the two halves of the fork curving away to the right and left enclosed a small but exquisitely ornamented park, or pleasure ground I might call it, provided with seats of some dark wood beautifully polished and carved. This park was ornamented with four fountains, each springing from a crystal basin and spreading out into a feathery
