strangeness in his mind."
"I think be has already seen it," said Khedron softly. But he said it to himself, and not to Jeserac.
"I do not believe that Alvin is happy," Jeserac continued. "He has formed no real attachments, and it is hard to see how he can while he still suffers from this obsession. But after all, he is very young. He may grow out of this phase, and become part of the pattern of the city."
Jeserac was talking to reassure himself; Khedron wondered if he really believed what he was saying.
"Tell me, Jeserac," asked Khedron abruptly, "does Alvin know that be is not the first Unique?"
Jeserac looked startled, then a little defiant.
"I might have guessed," he said ruefully, "that you would know that. How many Uniques have there been in the whole history of Diaspar? As many as ten?"
"Fourteen," answered Khedron without hesitation. "Not counting Alvin."
"You have better information than I can command," said Jeserac wryly. "Perhaps you can tell me what happened to those Uniques?"
"They disappeared."
"Thank you: I knew that already. That is why I have told Alvin as little as possible about his predecessors: it would hardly help him in his present mood. Can I rely on your co-operation?"
"For the moment-yes. I want to study him myself; mysteries have always intrigued me, and there are too few in Diaspar. Besides, I think that Fate may be arranging a jest beside which all my efforts will look very modest indeed. In that case, I want to make sure that I am present at its climax."
"You are rather too fond of talking in riddles," complained Jeserac. "Exactly what are you anticipating?"
"I doubt if my guesses will be any better than yours. But I believe this-neither you nor I nor anyone in Diaspar will be able to stop Alvin when he has decided what he wants to do. We have a very interesting few centuries ahead of us."
Jeserac sat motionless for a long time, his mathematics forgotten, after the image of Khedron had faded from sight. A sense of foreboding, the like of which he had never known before, hung heavily upon him. For a fleeting moment he wondered if be should request an audience with the Council -but would that not be making a ridiculous fuss about noth-ing? Perhaps the whole affair was some complicated and ob-scure jest of Khedron's, though he could not imagine why he had been chosen to be its butt.
He thought the matter over carefully, examining the prob-lem from every angle. After little more than an hour, he made a characteristic decision.
He would wait and see.
Alvin wasted no time learning all that he could about Khedron. Jeserac, as usual, was his main source of information. The old tutor gave a carefully factual account of his meeting with the Jester, and added what little he knew about the other's mode of life. Insofar as such a thing was possible in Diaspar, Khedron was a recluse: no one knew where he lived or anything about his way of life. The last jest he had contrived had been a rather childish prank involving a general paralysis of the moving ways. That had been fifty years ago; a century earlier he had let loose a particularly revolting dragon which had wandered around the city eating every existing specimen of the works of the currently most popular sculptor. The artist himself, justifiably alarmed when the beast's single-minded diet became obvious, had gone into hiding and not emerged until the monster had vanished as mysteriously as it had appeared.
One thing was obvious from these accounts. Khedron must have a profound understanding of the machines and powers that ruled the city, and could make them obey his will in ways which no one else could do. Presumably there must be some overriding control which prevented any too-ambitious Jester from causing permanent and irreparable damage to the complex structure of Diaspar.
Alvin filed all this information away, but made no move to contact Khedron. Though he had many questions to ask the Jester, his stubborn streak of independence-perhaps the most truly unique of all his qualities-made him determined to discover all he could by his own unaided efforts. He had embarked on a project that might keep him busy for years, but as long as he felt that he was moving toward his goal he was happy.
Like some traveler of old mapping out an unknown land, he had begun the systematic exploration of Diaspar. He spent his weeks and days prowling through the lonely