artificial mutation—that is, they changed themselves, slowly, over many generations, until their brains grew a new part that could generate this controlling force. We can now even, fly between the stars, by this power. But your people don't have that brain, so we had to build spaceships to take you away." "I see," she said. "Your great-great-great-grandchildren can be like us, if your people want to be changed thus," he said. "They didn't want to change before," she answered. "I don't think they'll do it now, even in their new home." Her voice held no bitterness; it was an acceptance. Privately, Jorun doubted it. The psychic shock of this uprooting would be bound to destroy the old traditions of the Terrans; it would not take many centuries before they were culturally assimilated by Galactic civilization. Assimilated—nice euphemism. Why not just say—eaten? They landed on the beach. It was broad and white, running in dunes from the thin, harsh, salt-streaked grass to the roar and tumble of surf. The sun was low over the watery horizon, filling the damp, blowing air with gold. Jorun could almost look directly at its huge disc. He sat down. The sand gritted tinily under him, and the wind rumpled his hair and filled his nostrils with its sharp wet smell. He picked up a conch and turned it over in his fingers, wondering at the intricate architecture of it. "If you hold it to your ear," said Julith, "you can hear the sea." Her childish voice was curiously tender around the rough syllables of Earth's language. He nodded and obeyed her hint. It was only the small pulse of blood within him—you heard the same thing out in the great hollow silence of space—but it did sing of restless immensities, wind and foam, and the long waves marching under the moon. "I have two of them myself," said Julith. "I want them so I can always remember this beach. And my children and their children will hold them, too, and hear our sea talking." She folded his fingers around the shell. "You keep this one for yourself." "Thank you," he said. "I will." The combers rolled in, booming and spouting against the land. The Terrans called them the horses of God. A thin cloud in the west was turning rose and gold. "Are there