Arthur fumbled at his chin awkwardly, watching the astonishing panorama outside. There was hardly any distinguishing between the times the sun was up and the times it was below now, as the darkness and light followed each other so swiftly the effect was the same as one of the old flickering motion-pictures.
As Arthur watched, this effect became more pronounced. The tall Fifth Avenue Building across the way began to disintegrate. In a moment, it seemed, there was only a skeleton there. Then that vanished, story by story. A great cavity in the earth appeared, and then another building became visible, a smaller, brown-stone, unimpressive structure.
With bulging eyes Arthur stared across the city. Except for the flickering, he could see almost clearly now.
He no longer saw the sun rise and set. There was merely a streak of unpleasantly brilliant light across the sky. Bit by bit, building by building, the city began to disintegrate and become replaced by smaller, dingier buildings. In a little while those began to disappear and leave gaps where they vanished.
Arthur strained his eyes and looked far down-town. He saw a forest of masts and spars along the waterfront for a moment and when he turned his eyes again to the scenery near him it was almost barren of houses, and what few showed were mean, small residences, apparently set in the midst of farms and plantations.
Estelle was sobbing.
"Oh, Mr. Chamberlain," she cried. "What is the matter? What has happened?"
Arthur had lost his fear of what their fate would be in his absorbing interest in what he saw. He was staring out of the window, wide-eyed, lost in the sight before him. At Estelle's cry, however, he reluctantly left the window and patted her shoulder awkwardly.
"I don't know how to explain it," he said uncomfortably, "but it's obvious that my first surmise was all wrong. The speed of the earth's rotation can't have been increased, because if it had to the extent we see, we'd have been thrown off into space long ago. But—have you read anything about the Fourth Dimension?"
Estelle shook her head hopelessly.