"... desperate, with no time to complete essential testing. A terrible gamble, but one which inevitably...." The meaning faded from Troy's mind as he discovered the wall-speaker from which the words were coming. His eyes darted across the room to a comfortable chair drawn up beside a table, to a familiar picture of untidily arrayed piles of notes on the table, a thread of smoke still rising from a cigarette in the tray among them. Clingman had been in the room within minutes, listening to one of his previous recordings as he worked. Troy's glance shifted to a closed door on his right. Bedroom and bath of the suite lay behind it. Clingman might be there. He might also ... Troy reached back, quietly opened the door to the hall again, moved on and slipped out of sight behind an ornamental screen on the other side of the speaker. Clingman could have left his quarters for some reason. In any event, it was obvious that he had intended to return to the room very shortly. If he brought someone with him, the situation might be more difficult. But hardly too difficult to be handled. Troy worked the improvised silencer back over the gun muzzle, senses straining to catch either the opening of the door on his right or the sound of an approach down the hall. "So it was possible," he heard the wall-speaker say, "to reconstruct, in almost every essential detail, what the concluding situation must have been on the world where the Tareeg species had its origin. The attacking section was safely screened, presumably by a form of energy barrier, against the deadly agent it had released. The section under attack had no defense against an agent so nearly indestructible that it subsequently survived for over a thousand years in its inert, frozen condition without losing effectiveness in the least--" Troy thought: What ... WHAT HAD IT SAID? He stepped out from behind the screen as the door on his right opened. Dr. Clingman stood in the door, mouth open, eyes bulging in surprise and alarm at the gun in Troy's hand. Then his gaze shifted to Troy's face, and his expression slowly changed. "Mister Gordon," he murmured, smiling very cautiously, "you are really the most difficult man to keep stopped!" Troy pointed a shaking finger at the speaker. "That!" he cried. "That ... it said _a thousand years in the ice_!" Clingman nodded. "Yes." His eyes returned, still rather warily, to the gun. "And I'm rather glad, you know, you happened to catch that particular part before I appeared." Troy was staring at him. "That was their lost home-world--the one you've kept talking about. That great asteroid cloud here...." "No, not here." Clingman came forward more confidently into the room, and Troy saw now that the left side of the scientist's face and head was covered with medical plastic. "The Cassa system is a long way behind us, Gordon," Clingman said. "We've been on our way back to Earth for more than two days." "To Earth," Troy muttered. "And I...."