Hilvar met him for the second time outside the house, and for the second time introduced him to Seranis and the Senators. They greeted him with a kind of wary and reluctant respect; if they wondered where the robot had gone, they made no comment.

«I’m very sorry,» Alvin began, «that I had to leave your country in such an undignified fashion. It may interest you to know that it was nearly as difficult to escape from Diaspar.» He let that remark sink in, then added quickly, «I have told my people all about Lys, and I did my best to give a favorable impression. But Diaspar will have nothing to do with you. In spite of all I could say, it wishes to avoid contamination with an inferior culture.»

It was most satisfying to watch the Senators’ reactions, and even the urbane Seranis colored slightly at his words. If he could make Lys and Diaspar sufficiently annoyed with each other, thought Alvin, his problem would be more than half solved. Each would be so anxious to prove the superiority if its own way of life that the barriers between them would soon go down.

«Why have you come back to Lys?» asked Seranis.

«Because I want to convince you, as well as Diaspar, that you have made a mistake.» He did not add his other reason -that in Lys was the only friend of whom he could be certain and whose help he now needed.

The Senators were still silent, waiting for him to continue, and he knew that looking through their eyes and listening through their ears were many other unseen intelfigences. He was the representative of Diaspar, and the whole of Lys was judging him by what he might say. It was a great responsibility, and he felt humbled before it. He marshaled his thoughts and then began to speak.

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 spent their lives to increase its beauty. No one, he told them, could ever exhaust the city’s treasures, however long they lived; always there would be something new. 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 that the artists of the past had created for men’s eternal admiration. And he wondered a little wistfully if it were indeed true that the music of Diaspar was the last sound that 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 before remember. The strain and excitement of the long day had told on him at last, and quite suddenly he was asleep.

When he awoke, he was in an unfamiliar room and it was some moments before he remembered that he was no longer in Diaspar. As consciousness returned, so the light grew around him, until presently he was bathed in the soft, cool radiance of the morning sun, streaming through the now transparent walls. He lay in drowsy half-awareness, recalling the events of the previous day and wondering what forces he had now set in motion.

With a soft, musical sound, one of the walls began to pleat itself up in a manner so complicated that it eluded the eye. Hilvar stepped through the opening that had been formed and looked at Alvin with an expression half of amusement, half of serious concern.

«Now that you’re awake,Alvin,» he said «perhaps you’ll at least tell me what your next move is, and how you man aged to return here. The Senators are just leaving to look at the subway; they can’t understand how you managed to come back through it. Did you?»

Alvin jumped out of bed and stretched himself mightily.

«Perhaps we’d better overtake them,» he said. «I don’t want to make them waste their time. As for the question you asked me-in a little while I’ll show you the answer to that.»

They had almost reached the lake before they overtook the three Senators, and both parties exchanged slightly selfconscious greetings. The Committee of Investigation could see that Alvin knew where it was going, and the unexpected encounter had clearly put it somewhat at a loss.

«I’m afraid I misled you last night,» said Alvin cheerfully. «I didn’t come to Lys by the old route, so your attempt to close it was quite unnecessary. As a matter of fact, the Council of Diaspar also closed it at their end, with equal lack of success.»

The Senators’ faces were a study in perplexity as one solution after another chased through their brains.

«Then how did you get here?» said the leader. There was a sudden, dawning comprehension in his eyes, and Alvin could tell that he 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 swiftly for the eye to follow, a needle of silver light arched 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 petal 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 meteoric fashion. The thought was disconcerting, although there had been no sensation of movement on his voyage. Considerably more puzzling, however, was the fact that a day ago this resplendent creature had been hidden beneath a thick layer of iron-hard rock-the coating it had still retained when it had torn itself loose from the desert. 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 shell which neither time nor any natural force could ever touch.

With Hilvar by his side, Alvin stood in the open door and looked back at the silent Senators. He wondered what they were thinking-what, indeed, the whole of Lys was thinking. From their expressions, it almost seemed as if they were beyond thought.

I am going to Shalmirane’ « said Alvin, «and I will be back in Airlee within an hour or so. But that is only a beginning, and while I am away, there is a thought I would leave with you.

«This is no ordinary flyer of the kind in which men traveled over the Earth. It is a spaceship, one of the fastest ever built. If you want to know where I found it, you will find the answer in Diaspar. But you will have to go there, for Diaspar will never come to you.»

He turned to Hilvar, and gestured to the door. Hilvar hesitated for a moment only, looking back once at the familiar scenes around him. Then he stepped forward into the air lock.

The Senators watched until the ship, now moving quite slowly-for it had only a little way to go-had disappeared into the south. Then the gray-haired young man who led the group shrugged his shoulders philosophically and turned to one of his colleagues.

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