"What thing, Mr. Sollenar?" They turned the corner of a corridor, with branching hallways here and there, not all of them busy. "Come here," Sollenar said, nodding toward one of them. They stopped out of sight of the lobby and the main corridor. "Come on," Sollenar said. "A little further." "No," Ermine said. "This is farther than I really wish. It's dark here." "Wise too late, Mr. Ermine," Sollenar said, his arms flashing out. One palm impacted against Ermine's solar plexus, and the other against the muscle at the side of his neck, but not hard enough to kill. Ermine collapsed, starved for oxygen, while Sollenar silently cursed having been cured of murder. Then Sollenar turned and ran. Behind him Ermine's body struggled to draw breath by reflex alone. Moving as fast as he dared, Sollenar walked back and reached the taxi lock, pulling a respirator from a wall rack as he went. He flagged a car and gave his destination, looking behind him. He had seen nothing of Cortwright Burr since setting foot on Mars. But he knew that soon or late, Burr would find him. A few moments later Ermine got to his feet. Sollenar's car was well away. Ermine shrugged and went to the local broadcasting station. He commandeered a private desk, a firearm and immediate time on the IAB interoffice circuit to Earth. When his call acknowledgement had come back to him from his office there, he reported: "Sollenar is enroute to the Martian city. He wants a duplicate of Burr's device, of course, since he smashed the original when he killed Burr. I'll follow and make final disposition. The disorientation I reported previously is progressing rapidly. Almost all his responses now are inappropriate. On the flight out, he seemed to be staring at something in an empty seat. Quite often when spoken to he obviously hears something else entirely. I expect to catch one of the next few flights back." There was no point in waiting for comment to wend its way back from Earth. Ermine left. He went to a cab rank and paid the exorbitant fee for transportation outside Aresian city limits. Close at hand, the Martian city was like a welter of broken pots. Shards of wall and roof joined at savage