Tommy had forgotten Von Holtz, had forgotten the laboratory, had forgotten absolutely everything. If his original suspicions of Von Holtz had been justified, he could have been killed half a dozen times over. He was oblivious to everything but the sight before his eyes. Now he felt a touch on his shoulder and drew his head away with a jerk. Von Holtz was looking down at him, very pale, with his weak-looking eyes anxious. "They are still all right?" he demanded. "Yes," said Tommy dazedly. "Surely. Who is that girl?" "That is the Herr Professor's daughter Evelyn," said Von Holtz uneasily. "I suggest, Herr Reames, that you swing the dimensoscope about." "The--what?" asked Tommy, still dazed by what he had seen. "The dimensoscope. This." Von Holtz shifted the brass tube. The whole thing was mounted so that it could be swung in any direction. The mounting was exactly like that of a normal telescope. Tommy instantly put his eye to the eyepiece again. * * * * * He saw more tree-ferns, practically the duplicates of the background beyond the globe. Nothing moved save small, fugitive creatures among their fronds. He swung the telescope still farther. The landscape swept by before his eyes. The tree-fern forest drew back. He saw the beginning of a vast and noisome morass, over which lay a thick haze as of a stream raised by the sun. He saw something move in that morass; something huge and horrible with a long and snake-like neck and the tiniest of heads at the end of it. But he could not see the thing clearly. He swung the telescope yet again. And he looked over miles and miles of level, haze-blanketed marsh. Here and there were clumps of taller vegetation. Here and there were steaming, desolate pools. And three or four times he saw monstrous objects moving about clumsily in the marsh-land. But then a glitter at the skyline caught his eye. He tilted the telescope to see more clearly, and suddenly he caught his breath. There, far away at the very horizon, was a city. It was tall and gleaming and very strange. No earthly city ever flung its towers so splendidly high and soaring. No city ever built by man gave off the fiery gleam of gold from all its walls and pinnacles. It looked like an artist's dream, hammered out in precious metal, with its outlines softened by the haze of distance. And something was moving in the air near the city. Staring, tense, again incredulous, Tommy Reames strained his eyes and saw that it was a machine. An air-craft; a flying-machine of a type wholly unlike anything ever built upon the planet Earth. It swept steadily and swiftly toward the city, dwindling as it went. It swooped downward toward one of the mighty spires of the city of golden gleams, and vanished. * * * * *