There was no visible movement anywhere. But presently, as one staring at a great motionless cloud will see its shape is changing, I began to see changes. The flat gray solidity was not flat, but hugely convex. And it was slowly turning. Huge convolutions of it were, slowly as a cloud bank, taking new forms. And all of it was slowly moving backward. Then we came to the end of it. Black emptiness ahead. Behind us was a gray-massed, globular cloud. Then another, its twin fellow, came rolling up beneath us in front, spread to the sides, shrank again behind us. “Molecules,” said Dr. Weatherby. “See how they’re dwindling!” I saw presently, swarms of them, always smaller. And ahead of us they seemed congealed into a gray solidity—a substance, it was passing beneath us, and to the sides. Again quite unexpectedly, my viewpoint changed. I saw our vehicle plunging upward, its pointed bow held upward at an angle. A solidity was around us; to the sides, gray, smooth curtains; overhead a glow of white in a dead black void. A black void? My heart leaped. That was not blackness up there above our bow! It was blue! Color! The first sight of color. A blue vista of distance, with light up there. Light and air! Beside us the smooth gray walls were smooth no longer. Huge jagged rocks and boulders, a precipice! We seemed in some immense canyon, slowly floating upward. But it was a dwindling canyon. And then abruptly we emerged from it. I saw its walls close together beneath us. An area of gray was down there; gray with a white light on it. The light made sharp inky shadows on a tumbling naked waste of rock. The gray area was shrinking to a blob, a blob of gray shining in a brilliant light. Directly beneath us, stretching to the horizon on both sides, lay an undulating white level surface. The single blob of gray was down there on it. And off in the distance, where the surface seemed abruptly to end, gigantic blurs loomed into the blue sky. Dr. Weatherby was calling me to the tower. I found him trembling with eagerness. “Leonard, I have the electro-telescope working. Look through it.” I gazed first through the front and overhead tower windows. The white disk filled a perceptible area of the sky. But it was not like a sun; it seemed rather a smooth, flat disk with light behind it, a white disk with a dark narrow rim. Clear, cloudless sky was everywhere else. And very far away, behind and above the white disk, I saw a gigantic, formless, colorless shape towering into the blue of distance. “Look through the telescope, Leonard.” I gazed upward through the electro-telescope. Its condensing lens narrowed the whole gigantic scene into a small circular field of vision. I gasped. Wonderment, awe swept over me. The blue sky was the open space of a tremendously large room: I saw plainly its ceiling, floor and distant walls.