They were the snap of the electrical discharge as the Atom Smasher began to operate, and why the snap had sounded like a heavy body falling a long distance away, was not known.
Tode had said one day, with what Jim had taken for sarcasm, that they represented the wave series of a single sound extended in time to make four-dimensional action, but Jim had never considered the explanation seriously.
That sound, bringing back all Jim's memories of their experiments, brought him to his feet sharply. He swung around. The surface of the pool was a bubbling, seething mass of mud and water. And over its surface that faint violet haze was beginning to spread.
In the center where the light was thickest, something like a gyroscope appeared to be revolving. Out of the gyroscope something was beginning to project—that infernal tube of Lucius Tode. And Jim knew that in the heart of the flame that enormous, distorted face of Lucius Tode would again be visible.
The human nervous system can only endure a certain amount of impact. The sight of that ghastly flame, already condensing into a violet pillar, was more than Jim could stand. He dragged old Parrish to his feet and started off with him into the thickest part of the undergrowth.
A fearful scream behind him stopped him at the very edge of the scrub. He looked back, still supporting the half-conscious old man in his arms. The violet flame was shooting up in a straight pillar, the whole central portion of the pool was dry, and the waters were heaped up all around it.
From the slightly elevated spot where Jim stood, he could see Tode holding Lucille in his arms in the very heart of the fire, which threw a pale, fluorescent light over their faces. Tode was wearing a spotted skin, like that of a leopard, and Lucille was in the blue frock that she had worn when Jim and she had dinner together two evenings before.
Jim dropped old Parrish, shouted in answer, and dashed back like a madman down the slope into the solid wall of water.
HE fought his way desperately through that wall, which seemed of the consistency of soft rubber or treacle, as if some subtle change had taken place in its molecular isomers. It adhered to him without wetting him, and he plunged through it, hearing Lucille cry out again, and yet again.
And now he was through, and once more struggling over the viscid surface of the pond. Behind him he heard old Parrish blundering, and screeching at the top of his voice, but he paid no attention to him.
He could see Lucille more clearly, and the large, hazy outlines of Tode's features were beginning to assume the proper proportions. There was a diabolical leer upon Tode's face, unchanged during the five years since Jim had seen him last, except that it had become more evil, more powerful. The enormous and distorted face that Jim had seen had been simply due to the presence of some refracting medium.
The pillar of violet light was thinning, spreading out over the pool, but Jim could now see the scene more clearly than before, even as he rushed onward.
The machine was inside what looked like a flat boat, but more circular than a boat, and apparently was made of some metal resembling aluminum. Either from the metal hull or from the mechanism inside it there was emitted a pungent odor resembling chlorine.
The mechanism itself bore some resemblance to the old Atom Smasher of five years before, but it appeared to be immensely more complicated. Wheels of various sizes were set at every conceivable angle around the central tube, from which the violet light was emanating, and all were rotating and gyrating so fast that they looked like discs of light. The boat itself was trembling, and this movement appeared to be com-
