"But I don't want to stay out here all night," he continued. "Have I your promise?"

             Seranis sighed, and a faint smile played about her lips.

             "Yes," she said, "We won't attempt to control you again. Though I don't think we were very successful before."

             Alvin waited until the robot had returned. Very carefully he gave the machine its instructions and made it repeat them back. Then he left the ship, and the airlock closed silently behind him.

             There was a faint whisper of air but no other sound. For a moment a dark shadow blotted out the stars: then the ship was gone. Not until it had vanished did Alvin realize his miscalculation. He had forgotten that the robot's senses were very different from his own, and the night was far darker than he had expected. More than once he lost the path completely, and several times he barely avoided colliding with trees. It was blackest of all in the forest, and once something quite large came towards him through the undergrowth. There was the faintest crackling of twigs, and two emerald eyes were looking steadfastly at him from the level of his waist. He called softly, and an incredibly long tongue rasped across his hand. A moment later a powerful body rubbed affectionately against him and departed without a sound. He had no idea what it could be.

             Presently the lights of the village were shining through the trees ahead, but he no longer needed their guidance, for the path beneath his feet had now become a river of dim blue fire. The moss upon which he was walking was luminous and his footprints left dark patches which slowly disappeared behind him. It was a beautiful and entrancing sight, and when Alvin stooped to pluck some of the strange moss it glowed for minutes in his cupped hands before its radiance died.

             Theon was waiting for him outside the house, and for the second time he was introduced to the three councillors. He noticed with some annoyance their barely concealed surprise: not appreciating the unfair advantages it gave him, he never cared to be reminded of his youth.

             They said little while he refreshed himself, and Alvin wondered what mental notes were being compared. He kept his mind as empty as he could until he had finished: then he began to talk as he had never talked before.

             His theme was Diaspar. He painted the city as he had last seen it, dreaming on the breast of the desert, its towers glowing like captive rainbows against the sky. From the treasure-house of memory he recalled the songs that the poets of old had written in praise of Diaspar, and he spoke of the countless men who had burned away their lives to increase its beauty. No one now, he told them, could ever exhaust a hundredth of the city's treasures, however long they lived. For a while he described some of the wonders which the men of Diaspar had wrought: he tried to make them catch a glimpse at least of the loveliness which such artists as Shervane and Perildor had created for men's eternal admiration. And he spoke also of Loronei, whose name he bore, and wondered a little wistfully if it were indeed true that his music was the last sound Earth had ever broadcast to the stars.

             They heard him to the end without interruption or questioning. When he had finished it was very late and Alvin felt more tired than he could ever remember. The strain and excitement of the long day had told on him at last, and quite suddenly he fell asleep.

             Alvin was still tired when they left the village not long after dawn. Early though it was, they were not the first upon the road. By the lake they overtook the three councillors, and both parties exchanged slightly self-conscious greetings. Alvin knew perfectly well where the Committee of Investigation was going, and thought it would be appreciated if he saved it some trouble. He stopped when they reached the foot of the hill and turned toward his companions.

             "I'm afraid I misled you last night," he said cheerfully. "I didn't come to Lys by the old route, so your attempt to close it wasn't really necessary."

             The councillors' faces were a study in relief and increased perplexity.

             "Then how did you get here?" The leader of the Committee spoke, and Alvin could tell that he at least had begun to guess the truth. He wondered if he had intercepted the command his mind had just sent winging across the mountains. But he said nothing, and merely pointed in silence to the northern sky.

             Too swift for the eye to follow, a needle of silver light arced across the mountains, leaving a mile-long trail of incandescence. Twenty thousand feet above Lys, it stopped. There was no deceleration, no slow braking of its colossal speed. It came to a halt instantly, so that the eye that had been following it moved on across a quarter of the heavens before the brain could arrest its motion. Down from the skies crashed a mighty peal of thunder, the sound of air battered and smashed by the violence of the ship's passage. A little later the ship itself, gleaming splendidly in the sunlight, came to rest upon the hillside a hundred yards away.

             It was difficult to say who was the most surprised, but Alvin was the first to recover. As they walked—very nearly running—toward the spaceship, he wondered if it normally traveled in this abrupt fashion. The thought was disconcerting, although there had been no sensation of movement on his first voyage. Considerably more puzzling, however, was the fact that the day before this resplendent creature had been hidden beneath a thick layer of iron-hard rock. Not until Alvin had reached the ship, and burned his fingers by incautiously resting them on the hull, did he understand what had happened. Near the stern there were still traces of earth, but it had been fused into lava. All the rest had been swept away, leaving uncovered the stubborn metal which neither time nor any natural force could ever touch.

             With Theon by his side, Alvin stood in the open door and looked back at the three silent councillors. He wondered what they were thinking, but their expressions gave no hint of their thoughts.

             "I have a debt to pay in Shalmirane," he said. "Please tell Seranis we'll be back by noon."

             The councillors watched until the ship, now moving quite slowly—for it had only a little way to go—had disappeared into the south. Then the young man who led the group shrugged his shoulders philosophically.

             "You've always opposed us for wanting change," he said, "and so far you've won. But I don't think the future lies with either of our parties now. Lys and Diaspar have both come to the end of an era, and we must make the best of it."

             There was silence for a little while. Then one of his companions spoke in a very thoughtful voice.

             "I know nothing of archeology, but surely that machine was too large to be an ordinary flyer. Do you think it could possibly have been—"

             "A spaceship? If so, this is a crisis!"

             The third man had also been thinking deeply.

             "The disappearance of both flyers and spaceships is one of the greatest mysteries of the Interregnum. That machine may be either: for the moment we had better assume the worst. If it is in fact a spaceship, we must at all costs prevent that boy from leaving Earth. There is the danger that he may attract the Invaders again. That would be the end."

             A gloomy silence settled over the company until the leader spoke again.

             "That machine came from Diaspar," he said slowly. "Someone there must know the truth. I think we had better get in touch with our cousins—if they'll condescend to speak to us."