Once more the interior of the building seemed to have split apart. Wider now. He saw the rushing white current below. To the right, above the forest on the bank, the sun was a swollen red ball glaring through layers of mist. And to the left, moving slowly over the river in the blaze of long-dead daylight, was something both unmistakable and not to be believed. But, staring at it in the instant before the scene shivered and vanished again, Dowland suddenly thought he knew what had happened here. What he had seen was a spaceship. He turned, went stumbling hurriedly out the door into the whistling wind, saw Jill Trelawney standing there, white-faced, eyes huge, hands to her mouth. He caught her shoulder. "Come on! We've got to get away from here." She gasped, "It--_tore_ him apart!" "We can't help him...." Dust clouds were spinning over the back of the mesa, concealing the upper slopes. Dowland glanced to the west, winced at the towering mountain of darkness sweeping toward them through the sky. He plunged up the slope, hauling her along behind him. Jill cried out incoherently once, in a choking voice, but he didn't stop to hear what she was trying to say. He shoved her into the house, slammed the door shut behind them, hurried her on down the hall and into the living room. As they came in, he switched off his AR field and felt air fill his lungs easily again. It was like surfacing out of deep water. The detector still hissed its thin warning, but it was almost inaudible. They would have to risk radiation now. "Out of your suit, quick! Whatever's happening in the lab has whistled up a dust storm here. When it hits, that radiation field will strangle you in a minute outdoors." She stared at him dumbly. "Get out of your suit!" Dowland shouted, his nerves snapping. "We're going down the eastern wall. It's our only chance. But we can't get down alive if we can't breathe...." Then, as she began unbuckling the suit hurriedly with shaking fingers, he turned to the pile of camping equipment beside the fireplace and pawed through it. He found the communicator and was snapping it to the mountaineering harness when the front door slammed. He wheeled about, startled. Jill's radiation suit lay on the floor near the entry hall. She was gone. He was tearing the door open three seconds later, shouted, and saw her through the dust forty feet away, running up toward the forest. He mightn't have caught her if she hadn't stumbled and gone headlong. Dowland was on top of her before she could get up. She fought him in savage silence like an animal, tearing and biting, her eyes bloodshot slits. There was a mechanical fury about it that appalled him. But at last he got his right arm free, and brought his fist up solidly to the side of her jaw. Jill's head flew back, and her eyes closed. * * * * *