Now indeed am I gone weary that I should need to tell so much concerning the air of that Time and Place; for surely I do seem to make this my story as that I did make a lecturing upon matters of chemistry; and so do I cast about, that I may not bother to tell more upon this matter. Yet, in truth, a little more of my thinkings and observings had I better set down here, and so be done with it. But you shall have patience with me, and know that had this, my story, been no more than an idle tale, I had been free to make no labour with such matters. Now there doth a wonder come to me why that the Road Makers, who were of that far-off Age which was before the Age of the Mighty Pyramid, did not _fly_ downward from the upper world into the deep of the monstrous valley; but did instead build a road. Yet it may be that the air of the upper world had grown thin a great age, so that they had truly forgot that once man did have power to fly. But even if that they did have proper machines to this purpose, surely it were a wondrous and fearful thing to fly downward an hundred great miles; for they surely to have a dread that they never to rise again through so huge a deep. And, moreover, the downward world that was the bottom of the Great Valley, was full of monsters, as was told in the little metal book. And the monsters were very strange and unknown; and foreign to the whole world, that had never come unto the deep of the Valley. And the Valley had come, as you shall mind, when the earth did split; and this thing was, in truth, like to be thought that same Ending of the World, which all Nations have been taught to believe shall come. For in verity, when the world did split and burst, and the oceans rushed downward into the earth, and there was fire, and storms, and a mighty chaos, surely it was proper to think that the End had come. Yet was it, in truth, but the beginning of hope of a new Eternity of Life; so that out of the End came the Beginning, and Life out of Death, and Good out of that which did seem a dire matter. And so is it always. Yet doth this go past my first wonder, which did concern the wherefore that they made not to descend in Things of Flight. Yet, maybe, shall my reasons stand to show why this was not. And again, mayhap it did chance that some were wild adventurers, and did leap over the edge of the upper world, having to ease their flight certain contrivings, like to parachutes. And these you shall picture, as that you watched them to leap; and so shall you see them go downward into the gloom; and you shall see them for maybe ten miles, and maybe for twenty miles; and afterward shall they be lost utterly in that Great Deep, and seen no more of any man for ever.