Even as he said these words, he somehow knew that they were wrong. Alystra gave a strangled scream, the interior of the subterrene wavered like an image seen through water, and behind and beyond the metal walls that surrounded him Alvin once more glimpsed that other universe. The two worlds seemed in conflict, first one and then the other predominating. Then quite suddenly, it was all over. There was a snapping, rending sensation-and the dream had ended. Alvin was back in Diaspar, in his own familiar room, floating a foot or two above the floor as the gravity field protected him from the bruising contact of brute matter.

He was himself again. This was reality-and he knew exactly what would happen next.

Alystra was the first to appear. She was more upset than annoyed, for she was very much in love with Alvin.

«Oh, Alvin!» she lamented as she looked down at him from the wall in which she had apparently materialized, «It was such an exciting adventure! Why did you have to spoil it?»

«I’m sorry. I didn’t intend to-I just thought it would be a good idea…»

He was interrupted by the simultaneous arrival of Callistron and Floranus.

«Now listen, Alvin,» began Callistron. «This is the third time you’ve interrupted a saga. You broke the sequence yesterday by wanting to climb out of the Valley of Rainbows. And the day before you upset everything by trying to get back to the Origin in that time track we were exploring. If you won’t keep the rules, you’ll have to go by yourself.»

He vanished in high dudgeon taking Floranus with him. Narillian never appeared at all; he was probably too fed up with the whole affair. Only the image of Alystra was left, looking sadly down at Alvin.

Alvin tilted the gravity field, rose to his feet, and walked toward the table he had materialized. A bowl of exotic fruit appeared upon it-not the food he had intended, for in his confusion his thoughts had wandered: Not wishing to revealhis error, he picked up the least dangerous-looking of the fruits and started to suck it cautiously.

«Well,» said Alystra at last, «what are you going to do?»

«I can’t help it,» he said a little sulkily. «I think the rules are stupid. Besides, how can I remember them when I’m living a saga? I just behave in the way that seems natural. Didn’t you want to look at the mountain?»

Alystra’s eyes widened with horror.

«That would have meant going outside!» she gasped.

Alvin knew that it was useless to argue further. Here was the barrier that sundered him from all the people of his world, and which might doom him to a life of frustration. He was always wanting to go outside, both in reality and in dream. Yet to everyone in Diaspar, «outside» was a nightmare that they could not face. They would never talk about it if it could be avoided; it was something unclean and evil. Not even Jeserac his tutor, would tell him why.

Alystra was still watching him with puzzled but tender eyes. «You’re unhappy, Alvin,» she said. “No one should be unhappy in Diaspar. Let me come over and talk to you.»

Ungallantly, Alvin shook his head. He knew where that would lead and at the moment he wanted to be alone. Doubly disappointed, Alystra faded from view.

In a city of ten million human beings, thought Alvin, there was no one to whom he could really talk. Eriston and Etania were fond of him in their way, but now that their term of guardianship was ending, they were happy enough to leave him to shape his own amusements and his own life. In the last few years, as his divergence from the standard pattern became more and more obvious, he had often felt his parents’ resentment. Not with him-that perhaps, was something he could have faced and fought-but with the sheer bad luck that had chosen them from all the city’s millions, to meet him when he walked out of the Hall of Creation twenty years ago.

Twenty years. He could remember the first moment, and the first words he had ever heard: «Welcome, Alvin. I am Eriston, your appointed father. This is Etania, your mother.» The words had meant nothing then, but his mind had recorded them with flawless accuracy. He remembered how he had looked down at his body; it was an inch or two taller now, but had scarcely altered since the moment of his birth. He had come almost fully grown into the world, and would have changed little save in height when it was time to leave it a thousand years hence.

Before that first memory, there was nothing. One day, perhaps, that nothingness would come again, but that was a thought too remote to touch his emotions in any way.

He turned his mind once more toward the mystery of his birth. It did not seem strange to Alvin that he might be created, in a single moment of time, by the powers and forces that materialized all the other objects of his everyday life. No; that was not the mystery. The enigma he had never been able to solve, and which no one would ever explain to him, was his uniqueness.

Unique. It was a strange, sad word-and a strange, sad thing to be. When it was applied to him-as he had often heard it done when no one thought he was listening-it seemed to possess ominous undertones that threatened more than his own happiness.

His parents, his tutor, everyone he knew, had tried to protect him from the truth, as if anxious to preserve the innocence of his long childhood. The pretense must soon be ended; in a few days he would be a full citizen of Diaspar, and nothing could be withheld from him that he wished to know.

Why, for example, did he not fit into the sagas? Of all the thousands of forms of recreation in the city, these were the most popular. When you entered a saga, you were not merely a passive observer, as in the crude entertainments of primitive times which Alvin had sometimes sampled. You were an active participant and possessed-or seemed to possess-free will. The events and scenes which were the raw material of your adventures might have been prepared beforehand by forgotten artists, but there was enough flexibility to allow for wide variation. You could go into these phantom worlds with your friends, seeking the excitement that did not exist in Diaspar-and as long as the dream lasted there was no way in which it could be distinguished from reality. Indeed, who could be certain that Diaspar itself was not the dream?

No one could ever exhaust all the sagas that had been conceived and recorded since the city began. They played upon all the emotions and were of infinitely varying subtlety. Some-those popular among the very young-were uncomplicated dramas of adventure and discovery. Others were purely explorations of psychological states, while others again were exercises in logic or mathematics which could provide the keenest of delights to more sophisticated minds.

Yet though the sagas seemed to satisfy his companions, they left Alvin with a feeling of incompleteness. For all their color and excitement, their varying locales and themes, there was something missing.

The sagas, he decided, never really got anywhere. They were always painted on such a narrow canvas. There were no great vistas, none of the rolling landscapes for which his soul craved. Above all, there was never a hint of the immensity in which the exploits of ancient man had really taken place -the luminous void between the stars and planets. The artists who had planned the sagas had been infected by the same strange phobia that ruled all the citizens of Diaspar. Even their vicarious adventures must take place cozily indoors, in subterranean caverns, or in neat little valleys surrounded by mountains that shut out all the rest of the world.

There was only one explanation. Far back in time, perhaps before Diaspar was founded, something had happened that had not only destroyed Man’s curiosity and ambition, but had sent him homeward from the stars to cower for shelter in the tiny closed world of Earth’s last city. He had renounced the Universe and returned to the artificial womb of Diaspar. The flaming, invincible urge that had once driven him over the Galaxy, and to the islands of mist beyond, had altogether died. No ships had entered the Solar System for countless aeons; out there among the stars the descendants of Man might still be building empires and wrecking suns-Earth neither knew nor cared.