“And what did you find?” asked Baley quickly.

“Nothing, Elijah. No sign of a duo-beam.”

Dr. Fastolfe said, “Well, Mr. Baley, does this sound reasonable to you?”

But Baley’s uncertainty was gone, now. He said, “Reasonable as far as it goes, perhaps, but it stops short of perfection by a hell of a way. What he doesn’t know is that my wife told me where she got the information and when. She learned he was a robot shortly after she left the house. Even then, the rumor had been circulating for hours. So the fact that he was a robot could not have leaked out through spying on our last evening’s conversation.”

“Nevertheless,” said Dr. Fastolfe, “his action last night of going to the Personal stands explained, I think.”

“But something is brought up that is not explained,” retorted Baley, heatedly. “When, where, and how was the leak? How did the news get about that there was a Spacer robot in the City? As far as I know, only two of us knew about the deal, Commissioner Enderby and myself, and we told no one.—Commissioner, did anyone else in the Department know?”

“No,” said Enderby, anxiously. “Not even the Mayor. Only we, and Dr. Fastolfe.”

“And he,” added Baley, pointing.

“I?” asked R. Daneel.

“Why not?”

“I was with you at all times, Elijah.”

“You were not,” cried Baley, fiercely. “I was in Personal for half an hour or more before we went to my apartment. During that time, we two were completely out of contact with one another. It was then that you got in touch with your group in the City.”

“What group?” asked Fastolfe.

And “What group?” echoed Commissioner Enderby almost simultaneously.

Baley rose from his chair and turned to the trimensic receiver. “Commissioner, I want you to listen closely to this. Tell me if it doesn’t all fall into a pattern. A murder is reported and by a curious coincidence it happens just as you are entering Spacetown to keep an appointment with the murdered man. You are shown the corpse of something supposed to be human, but the corpse has since been disposed of and is not available for close examination.

“The Spacers insist an Earthman did the killing, even though the only way they can make such an accusation stick is to suppose that a City man had left the City and cut cross country to Spacetown alone and at night. You know damn well how unlikely that is.

“Next they send a supposed robot into the City; in fact, they insist on sending him. The first thing the robot does is to threaten a crowd of human beings with a blaster. The second is to set in motion the rumor that there is a Spacer robot in the City. In fact, the rumor is so specific that Jessie told me it was known that he was working with the police. That means that before long it will be known that it was the robot who handled the blaster. Maybe even now the rumor is spreading across the yeast-vat country and down the Long Island hydroponic plants that there’s a killer robot on the loose.”

“This is impossible. Impossible!” groaned Enderby.

“No, it isn’t. It’s exactly what’s happening, Commissioner. Don’t you see it? There’s a conspiracy in the City, all right, but it’s run from Spacetown. The Spacers want to be able to report a murder. They want riots. They want an assault on Spacetown. The worse things get, the better the incident—and Spacer ships come down and occupy the Cities of Earth.”

Fastolfe said, mildly, “We had an excuse in the Barrier Riots of twenty-five years ago.”

“You weren’t ready then. You are now.” Baley’s heart was pounding madly.

“This is quite a complicated plot you’re attributing to us, Mr. Baley. If we wanted to occupy Earth, we could do so in much simpler fashion.

“Maybe not, Dr. Fastolfe. Your so-called robot told me that public opinion concerning Earth is by no means unified on your Outer Worlds. I think he was telling the truth at that time, anyway. Maybe an outright occupation wouldn’t sit well with the people at home. Maybe an incident is an absolute necessity. A good shocking incident.”

“Like a murder, eh? Is that it? You’ll admit it would have to be a pretended murder. You won’t suggest, I hope, that we’d really kill one of ourselves for the sake of an incident.”

“You built a robot to look like Dr. Sarton, blasted the robot, and showed the remains to Commissioner Enderby.”

“And then,” said Dr. Fastolfe, “having used R. Daneel to impersonate Dr. Sarton in the false murder, we have to use Dr. Sarton to impersonate R. Daneel in the false investigation of the false murder.”

“Exactly. I am telling you this in the presence of a witness who is not here in the flesh and whom you cannot blast out of existence and who is important enough to be believed by the City government and by Washington itself. We will be prepared for you and we know what your intentions are. If necessary, our government will report directly to your people, expose the situation for exactly what it is. I doubt if this sort of interstellar rape will be tolerated.”

Fastolfe shook his head. “Please, Mr. Baley, you are being unreasonable. Really, you have the most astonishing notions. Suppose now, just quietly suppose, that R. Daneel is really R. Daneel. Suppose he is actually a robot. Wouldn’t it follow that the corpse Commissioner Enderby saw was really Dr. Sarton? It would be scarcely reasonable to believe that the corpse were still another robot. Commissioner Enderby witnessed R. Daneel under construction and can vouch for the fact that only one existed.”

“If it comes to that,” said Baley, stubbornly, “the Commissioner is not a robotics expert. You might have had a dozen such robots.”

“Stick to the point, Mr. Baley. What if R. Daneel is really R. Daneel? Would not the entire structure of your reasoning fall to the ground? Would you have any further basis for your belief in this completely melodramatic and implausible interstellar plot you have constructed?”

“If he is a robot! I say he is human.”

“Yet you haven’t really investigated the problem, Mr. Baley,” said Fastolfe. “To differentiate a robot, even a very humanoid robot, from a human being, it isn’t necessary to make elaborately shaky deductions from little things he says and does. For instance, have you tried sticking a pin into R. Daneel?”

“What?” Baley’s mouth fell open.

“It’s a simple experiment. There are others perhaps not quite so simple. His skin and hair look real, but have you tried looking at them under adequate magnification. Then again, he seems to breathe, particularly when he is using air to talk, but have you noticed that his breathing is irregular, that minutes may go by during which he has no breath at all. You might even have trapped some of his expired air and measured the carbon dioxide content. You might have tried to draw a sample of blood. You might have tried to detect a pulse in his wrist, or a heartbeat under his shirt. Do you see what I mean, Mr. Baley?”

“That’s just talk,” said Baley, uneasily. “I’m not going to be bluffed. I might have tried any of those things, but do you suppose this alleged robot would have let me bring a hypodermic to him, or a stethoscope or a microscope?”

“Of course. I see your point,” said Fastolfe. He looked at R. Daneel and gestured slightly.

R. Daneel touched the cuff of his right shirt sleeve and the diamagnetic seam fell apart the entire length of his arm. A smooth, sinewy, and apparently entirely human limb lay exposed. Its short, bronze hairs, both in quantity and distribution, were exactly what one would expect of a human being.

Baley said, “So?”

R. Daneel pinched the ball of his right middle finger with the thumb and forefinger of his left hand. Exactly what the details of the manipulation that followed were, Baley could not see.

But, just as the fabric of the sleeve had fallen in two when the diamagnetic field of its seam had been interrupted, so now the arm itself fell in two.