Two small sections of the room were divided off by hangings of what might have been a gray metallic fabric--one inclosure where it seemed food was stored; the other, an instrument room. A low hum came from there. Alan saw lines of tiny wires of cobweb fineness, which began there and spread like a tiny white network woven into the walls and ceiling and floor of the room. And, in one corner, there was a small metal staircase--an incline spiraling upward through a trapdoor of the ceiling. Lea gestured. "Want us to go up?" said Alan. She evidently did. She showed him the dials again. They were passing the year 1995. She spoke to San. He remained at the instruments; Alan and Lea went up into the tower. Amazing sight! They stood on the narrow balcony which girdled the small tower room near its top. Alan had not dared to look down as they climbed the ladder. It seemed that around him was a gray, luminous fog. On the balcony he clung to the breast-high railing and stared. A gray monochrome of city--blended colors of whirling days and nights, seasons, years--all blended into this flat, shadowless gray. A blurred scene, crawling with movement. Melting outlines, changing with the progressive altered aspect of the passing years. 1995! 2000! Our great city of 1945, here just a few moments ago, now seemed so small and antiquated! What a tremendous giant, rearing itself here now around him! And it was still growing. Its great buildings had come up and were encroaching upon the park. They loomed far higher than the tower. He saw, off where Broadway traversed its diagonal path, a roof appear over the street. A great shadowy spread of roof--over Broadway--then over other streets. Growing giant of a city. The outlines of the huge buildings came nearer. The park was dwindling as the city flowed over it. Structures which Alan fancied might be great airplane stages rose high on stilted tower legs. One was quite near. It came up all in an instant--twice the tower's height, with an enormous platform upon its top. Once, for just an instant, Alan fancied he saw the shape of an airliner resting there. A thing which, because it persisted long enough for him to see it, must have been lying there for many months. The city seemed a single solid structure now--a vast building of tumbled, storied wings, and walls, towers and spires. A city, roofed over. The roof was over the tower now. The buildings had long since flowed over the park. No trees here now. No sky; no light from nature. The persisting man-made lights now were visible, blurred spots of dull yellow-red glow. It seemed suddenly a city infernal. Teeming multitudes here under one vast roof. Spider-like aerial bridges and viaducts were everywhere. The tower presently was set in the space of a street. Alan could see very little of the city's extent--a street of many pedestrian levels one above the other, flanked with great lights.