“You are not at your most tactful today,” said Fredda. “And I must confess I don’t see why our perfectly true answers should not satisfy you. Nor can I see what motive I would have for lying to you and Caliban.”

“I might add that I do not understand your motive for offending our principal benefactor,” said Caliban.

Prospero hesitated, and looked from one of them to the other. “My apologies,” he said at last. “There are times when my understanding of human psychology fails me, even when I am attempting to learn more. I was attempting to gauge your emotional reaction to such an accusation, Dr. Leving.”

“I would have to believe in the sincerity of the accusation before I could have much of a reaction to it,” said Fredda.

“Yes,” said Prospero. “Of course.”

But if Fredda Leving was sure of anything at that moment, she was sure that Prospero had not given her all of the story-and perhaps had not given her any of the true story. But what motive would Prospero have for playing such a strange game? It was rare indeed when she felt completely sure that she understood Prospero. She had long known he was one of her less stable creations. But he was the undisputed leader of the New Law robots. She had no real choice but to deal with him.

“In any event,” said Caliban, “it is time for us both to be leaving. I have no doubt, Dr. Leving, that we shall all meet again soon.”

“I look forward to it,” said Fredda.

The jet-black robot regarded first Fredda, and then Caliban. “Very well,” he said. “We will depart. But I doubt that I will be the first or last robot to observe that the more I know about humans, the less I understand them.”

Fredda Leving sighed wearily. There were times when it was frustrating in the extreme listening to Three-Law robots holding forth on the subject of human behavior. Prospero and the other New Laws were even worse. At least Three-Law robots were not judgmental. Prospero had an opinion about everything.

Fredda could almost imagine him as the last priest of some long-forgotten human religion, always ready to debate any intricate point of theology, so long as it was of no interest or importance to anyone at all. There were times Caliban was no better. She had designed and built both of these robots by herself. Surely she could have designed their brains so they didn’t spend their days logic-chopping. But it was too late now. “Whatever you think of my reasons for doing so,” she said, “I must ask you again to leave, by the back way. Our next appointment is in three days, is it not?”

“Yes,” said Prospero. “We have several other appointments that will take up the intervening time.”

“Fine then. Return in three days, in the afternoon, and we will conclude our business.”

Caliban nodded his head toward her, in what was almost a bow. “Very well,” he said in a most courteous tone. “We will see you at that time.”

Prospero took no interest in courtesy. He simply turned, opened the door, and left the room, leaving all the farewells to his companion. Caliban had to hurry just to keep up with him.

Fredda watched them go, and found herself once again wondering about Prospero. She did not understand what went on behind those glowing eyes. There was something not quite right about a robot that-that secretive. She shook her head as she crossed the room. Not much point in worrying about it now. She sealed the door shut behind them and scrambled the keypad. Only she and Caliban and Prospero knew the door’s keypad combination.

And there were times she thought seriously about taking at least one name off that list.

CALIBAN FOLLOWED PROSPERO down the tunnel. It ran for about a hundred meters, and deposited them at the base of a ravine that was otherwise quite inaccessible to the house. Their aircar was hidden there.

“I would like to know what all that was about,” Caliban said as they emerged from the tunnel into the cool of the evening.

“I spoke the truth,” Prospero said coolly. “It was in part merely a test to see how she would react to such an accusation. Surely you would agree it is worth knowing if she is capable of betraying us. “ Prospero climbed into the pilot’s station.

Caliban followed, climbing into the forward passenger seat. “I suppose the case could be made that such information would be useful in a general sense,” he said. “But you have dealt with Dr. Leving for quite some time now. Why worry about such hypotheticals now? And if the need for a test was only part of your intent, what was the rest?”

“I have answers to both questions, friend Caliban, but I do not choose to give them now. This is all I can tell you: I believe we are in danger. The possibility that we will be betrayed-or have been already-is quite real. And I can tell you no more than that.”

Prospero engaged the aircar’s controls, and they lifted off into the evening air. Caliban said no more, but he found that he had reached a conclusion about Prospero. There was no longer the slightest doubt in his mind that the New Law robot was unstable. He did not merely suspect betrayal on all sides-he virtually invited it. He had gone out of his way to encourage Dr. Leving’s hostility. More than likely, the fellow was confusing danger to himself with danger to the New Laws.

All of which made Caliban’s next decision quite simple. As soon as it was conveniently possible, he would put some distance, in every sense of the word, between himself and Prospero.

He no longer wished to stand quite so close to so tempting a target.

FREDDA LEVING WALKED to the other end of the underground safe room, and went through the open door there. She wearily closed the door behind her, and scrambled the combination as well. She, Fredda, was the only one who knew the combination to this door. Alvar had insisted on that much. He had no desire for a New Law robot like Prospero-let alone a No Law robot like Caliban-to have free access to his home. There had been times when she herself had been glad to keep her home well barricaded against New Law robots.

And of course, the New Laws felt the same way about humans. She still had not the slightest idea where, exactly, the New Law city of Valhalla was. She knew it was underground, and that it was in the Utopia sector, but that was about all. Fredda had even been taken there several times, but she had always been transported in a windowless aircar equipped with a system for jamming tracking devices. The New Law robots took no chances, and she could not blame them. Fredda had been quite willing to cooperate with their precautions, and to make sure everyone knew about them. They were for her safety as much as for that of the robots. What she did not know, she could not reveal under the Psychic Probe. The New Law robots had a large number of enemies. Some of them might well be willing to reduce the governor’s wife to a vegetable, and damn the consequences, if that was what it took to find the lair of the New Law robots.

Astonishing, really, the lengths they all went to. Not just the New Laws, but Alvar, and even herself. They all took such elaborate precautions. Against discovery, against scandal, against each other. No wonder Prospero was turning half paranoid. Maybe even more than half.

In all probability, of course, the precautions would turn out to be useless in the end. Plots and secrets and hidden agendas generally came crashing down, sooner or later. She had never been involved in a plot or a secret that hadn’t. But the secrets and plots and safeguards and precautions made them all feel better, feel secure, at least for a while. Perhaps that was the point of having them.

Fredda double-checked the inner door, and then stepped into the elevator car that would carry her up above ground, to the household proper.

OBR-323 was waiting there for her, in all his rather ponderous solemnity. “Master Kresh has landed,” he announced in his gravely, ponderous voice. “He should be here momentarily.”