Gray caught up Jill and began to run, toward the tube from which the wind howled in the cave. Behind him, grimly, Dio followed. The electric beasts didn't notice him. His insulated feet trampled through them, buried to the ankle in living flame, feeling queer tenuous bodies break and reform. The wind met them like a physical barrier at the tunnel mouth. Gray put Jill down. The wind strangled him. He tore off his coat and wrapped it over the girl's head, using his shirt over his own. Jill, her black curls whipped straight, tried to fight back past him, and he saw Dio coming, bent double against the wind. He saw something else. Something that made him grab Jill and point, his flesh crawling with swift, cold dread. * * * * * The electric beasts had finished their pleasure. The dead were cinders on the rock. The living had run back into the tunnels. And now the blue sea of fire was flowing again, straight toward the place where they stood. It was flowing fast, and Gray sensed an urgency, an impersonal haste, as though a command had been laid upon those living ropes of flame. The first dim rumble of thunder rolled down the wind. Gripping Jill, Gray turned up the tunnel. The wind, compressed in that narrow throat of rock, beat them blind and breathless, beat them to their bellies, to crawl. How long it took them, they never knew. But Gray caught glimpses of Dio the Martian crawling behind them, and behind him again, the relentless flow of the fire-things. They floundered out onto a rocky slope, fell away beneath the suck of the wind, and lay still, gasping. It was hot. Thunder crashed abruptly, and lightning flared between the cliffs. Gray felt a contracting of the heart. There were no cables. Then he saw it--the small, fast fighter flying below them on a flat plateau. A cave mouth beside it had been closed with a plastic door. The ship was the one that had followed them. He guessed at another one behind the protecting door. Raking the tumbled blond hair out of his eyes, Gray got up. Jill was still sitting, her black curls bowed between her hands. There wasn't much time, but Gray yielded to impulse. Pulling her head back by the silken hair, he kissed her. "If you ever get tired of virtue, sweetheart, look me up." But somehow he wasn't grinning, and he ran down the slope. He was almost to the open lock of the ship when things began to happen. Dio staggered out of the wind-tunnel and sagged down beside Jill. Then, abruptly, the big door opened. Five men came out--one in pilot's costume, two in nondescript apparel, one in expensive business clothes, and the fifth in dark prison garb. Gray recognized the last two. Caron of Mars and the errant Ward. They were evidently on the verge of leaving. But they looked cheerful. Caron's sickly-sweet face all but oozed honey, and Ward was grinning his rat's grin.