They didn't answer him. Their thoughts were confused and a bit irritated as they went out to the aircar that had brought them. But he knew they'd be back. And they would keep track of Eric. Prior, the caretaker, would help them. Prior was old too, and worried.... Walden walked back into his study, slowly. His legs were trembling. He hadn't realized how upset he had been. He smiled at the intensity of his emotions, realizing something he'd always kept hidden, even from himself. He was as fond of Eric as if the boy had been his own son. * * * * * Eric pushed the books away, impatiently. He didn't feel like studying. The equations were meaningless. He was tired of books, and history, and all the facts about the old race. He wanted to be outdoors, exploring, walking along the hillsides, looking for his own kind. But he had already explored the hills. He had flown for miles, and walked for miles, and searched dozens of caves in dozens of gorges. He had found no one. He was sure that if there had been anyone he would have discovered some sign. He opened the book again, but he couldn't concentrate on it. Beyond those hills, across another valley, there were even higher mountains. He had often looked across at them, wondering what they held. They were probably as desolate as the ones he'd searched. Still, he would rather be out in them, looking, than sitting here, fretting, almost hating the old race because it had somehow bequeathed him a heritage of loneliness. He got up abruptly and went outside to the aircar. It was a long way to the second range of mountains. He flew there directly, skimming over the nearer hills, the ones he had spent weeks exploring. He dropped low over the intervening valley, passing over the houses and towns, looking down at the gardens. The new race filled all the valleys. He came into the foothills and swung the car upward, climbing over the steep mountainsides. Within a mile from the valley's edge he was in wild country. He'd thought the other hills were wild, but here the terrain was jagged and rock-strewn, with boulders flung about as if by some giant hand. There were a hundred narrow canyons, opening into each other, steep-sloped, overgrown with brambles and almost impenetrable, a maze with the hills rising around them and cutting off all view of the surrounding country. Eric dropped down into one of the larger canyons. Immediately he realized how easy it would be to get lost in those hills. There were no landmarks that were not like a hundred jutting others. Without the aircar he would be lost in a few minutes. He wondered suddenly if anyone, old race or new, had ever been here before him. He set the aircar down on the valley floor and got out and walked away from it, upstream, following the little creek that tumbled past him over the rocks. By the time he had gone a hundred paces the car was out of sight.