Ten times, no more, the Galaxy had turned upon its axis since Man first walked on Earth. By its own standards, that was but a moment. Yet in that short period it had changed completely-changed far more than it had any right to do in the natural course of events. The great suns that had once burned so fiercely in the pride of youth were now guttering to their doom. But Alvin had never seen the heavens in their ancient glory, and so was unaware of all that had been lost.

The cold, seeping through into his bones, drove him back to the city. He extricated himself from the grating and rubbed the circulation back into his limbs. Ahead of him, down the tunnel, the light streaming out from Diaspar was so brilliant that for a moment he had to avert his eyes. Outside the city there were such things as day and night, but within it there was only eternal day. As the sun descended the sky above Diaspar would fill with light and no one would notice when the natural illumination vanished. Even before men had lost the need for sleep, they had driven darkness from their cities. The only night that ever came to Diaspar was a rare and unpredictable obscuration that sometimes visited the park and transformed it into a place of mystery.

Alvin came slowly back through the hall of mirrors, his mind still filled with night and stars. He felt inspired and yet depressed. There seemed no way in which he could ever escape out into that enormous emptiness-and no rational purpose in doing so. Jeserac had said that a man would soon die out in the desert, and Alvin could well believe him. Perhaps he might one day discover some way of leaving Diaspar, but if he did, he knew that he must soon return. To reach the desert would be an amusing game, no more. It was a game he could share with no one, and it would lead him nowhere. But at least it would be worth doing if it helped to quench the longing in his soul.

As if unwilling to return to the familiar world, Alvin lingered among the reflections from the past. He stood before one of the great mirrors and watched the scenes that came and went within its depths. Whatever mechanism produced these images was controlled by his presence, and to some extent by his thoughts. The mirrors were always blank when he first came into the room, but filled with action as soon as he moved among them.

He seemed to be standing in a large open courtyard which he had never seen in reality, but which probably still existed somewhere in Diaspar. It was unusually crowded, and some kind of public meeting seemed to be in progress. Two men were arguing politely on a raised platform while their supporters stood around and made interjections from time to time. The complete silence added to the charm of the scene, for imagination immediately went to work supplying the missing sounds. What were they debating? Alvin wondered. Perhaps it was not a real scene from the past, but a purely created episode. The careful balance of figures, the slightly formal movements, all made it seem a little too neat for life.

He studied the faces in the crowd, seeking for anyone he could recognize. There was no one here that he knew, but he might be looking at friends he would not meet for cen-turies to come. How many possible patterns of human physiog-nomy were there? The number was enormous, but it was still finite, especially when all the unesthetic variations had been eliminated.

The people in the mirror world continued their long-for-gotten argument, ignoring the image of Alvin which stood motionless among them. Sometimes it was very hard to be-lieve that he was not part of the scene himself, for the illu-sion was so flawless. When one of the phantoms in the mirror appeared to move behind Alvin, it vanished just as a real object would have done; and when one moved in front of him, he was the one who was eclipsed.

He was preparing to leave when he noticed an oddly dressed man standing a little apart from the main group. His movements, his clothes, everything about him, seemed slightly out of place in this assembly. He spoiled the pattern; like Alvin, he was an anachronism.He was a good deal more than that. He was real, and he was looking at Alvin with a slightly quizzical smile.

In his short lifetime, Alvin had met less than one-thousandth of the inhabitants of Diaspar. He was not surprised, therefore, that the man confronting him was a stranger. What did surprise him was to meet anyone at all here in this de-serted tower, so near the frontier of the unknown.

He turned his back on the mirror world and faced the intruder. Before he could speak, the other had addressed him.

«You are Alvin, I believe. When I discovered that someone was coming here, I should have guessed it was you.»

The remark was obviously not intended to give offense; it was a simple statement of fact, and Alvin accepted it as such. He was not surprised to be recognized; whether he liked it or not, the fact of his uniqueness, and its unrevealed po-tentialities, had made him known to everyone in the city.

«I am Hedron,» continued the stranger, as if that explained everything. «They call me the Jester.»

Alvin looked blank, and Khedron shrugged his shoulders in mock resignation.

«Ah, such is fame! Still, you are young and there have been no jests in your lifetime. Your ignorance is excused.»

There was something refreshingly unusual about Khedron. Alvin searched his mind for the meaning of the strange word «Jester»; it evoked the faintest of memories, but he could not identify it. There were many such titles in the complex social structure of the city, and it took a lifetime to learn, them all.

«Do you often come here?» Alvin asked, a little jealously. He had grown to regard the Tower of Loranne as his personal property and felt slightly annoyed that its marvels were known to anyone else. But had Khedron, he wondered, ever looked out across the desert or seen the stars sinking down into the west?

«No,» said Khedron, almost as if answering his unspoken thoughts. «I have never been here before. But it is my pleasure to learn of unusual happenings in the city ,and it is a very long time since anyone went to the Tower of Loranne.»

Alvin wondered fleetingly how Khedron knew of his earlier visits, but quickly dismissed the matter from his mind. Diaspar was full of eyes and ears and other more subtle sense organs which kept the city aware of all that was happening within it. Anyone who was sufficiently interested could no doubt find a way of tapping these channels.

«Even if it is unusual for anyone to come here,» said Alvin, still fencing verbally, «why should you be interested?»

«Because in Diaspar,» replied Khedron, «the unusual is my prerogative. I had marked you down a long time ago; I knew we should meet some day. After my fashion, I too am unique. Oh not in the way that you are; this is not my first life. I have walked a thousand times out of the Hall of Creation. But somewhere back at the beginning I was chosen to be Jester, and there is only one Jester at a time in Diaspar. Most people think that is one too many.»

There was an irony about Khedron’s speech that left Alvin still floundering. It was not the best of manners to ask direct personal questions, but after all Khedron had raised the subject.

«I’m sorry about my ignorance,» said Alvin. «But what is a Jester, and what does he do?»

«You ask ‘what,’» replied Khedron, «so I’ll start by telling you ‘why.’ It’s a long story, but I think you will be in-terested.»

«I am interested in everything,» said Alvin, truthfully enough.

«Very well. The men-if they were men, which I sometimes doubt-who designed Diaspar had to solve an incredibly complex problem. Diaspar is not merely a machine, you know-n is a living organism and an immortal one. We are so ac-customed to our society that we can’t appreciate how strange it would have seemed to our first ancestors. Here we have a tiny, closed world which never changes except in its minor details, and yet which is perfectly stable, age after age. It has probably lasted longer than the rest of human history-yet in that history there were, so it is believed, countless thou-sands of separate cultures and civilizations which endured for a little while and then perished. How did Diaspar achieve its extraordinary stability?»