Curt rolled over, mumbling in his sleep. The wind crept back like a padding cat, whispering in his ears. It resolved itself into a voice, a human voice very real and urgent. Curt sat up abruptly. This was no dream, the towering stranger was still there. Somehow he had passed through the electronic curtain across the doorway.... Curt leaped to his feet as he recognized George Landreth. VII The others came quickly awake. Lorine stared, then with a sob threw herself into her father's arms. Landreth comforted her, his face twisting strangely. He had aged greatly, Curt knew, he was still a dominant figure of a man. "Why did you do it, child, why?" Landreth spoke with a great effort. "You should never have come here!" Startled, Jeffers was staring at the electronic barrier. "Man, you came through that curtain! How is it done?" Rikert said fiercely, "Are you one of these things, too?" "I'm one of them, heaven help me, but soon I won't be! You must listen carefully now. I haven't much time!" Landreth paced the room with great uneven strides, face still twisting, his voice coming with an effort. "They call themselves _Energons_. Their life-principle is ionized protoplasm, that's as near as I can describe it! They subsist on the energy-source fields that originate within all planetary bodies. Electric, magnetic, gravitic, call it what you will. They left their System, far beyond Pluto, because it's in a state of disintegration for lack of the energy-magnetic source--" Landreth's features had gone pale and tight, as if some ghastly struggle were occurring within him. "I and three others boarded their ship. It drove toward the sun ... we couldn't stop it. We barely managed to bring it to a crash, here. In the crash some of the _Energons_ were released, they took possession of our unconscious bodies ... and they evolved their plan ... they must be stopped!" With a great effort Landreth managed to hold his body erect. Curt's mind raced. He saw the rest. Landreth and his three men were only the beginning. _Through them, completely Energon-dominated, the net had spread!_ Other men had been captured out of space and brought here. The _Energon_ life-forms had been taken secretly to other planets, to seize upon bodies, and bring them into _Energon_ control! The plan had taken two years, but they had selected well. Jal Tagar of Mars had been reached, and doubtless others among the highest officials and scientists in the Federation! This explained it all, the growing havoc and sabotage-- Curt saw the ghastly pattern, then he saw Landreth collapse against the wall as if all strength were being drained from him. Lorine hurried to his side, but Landreth waved her away.