“More or less,” said Baley. “You don’t approve?”

“Of course not. It is difficult to accept a gross parody of the human form as an intellectual equal. Can your factories do no better?”

“I’m sure they can, Daneel. I think we just prefer to know when we’re dealing with a robot and when we’re not.” He stared directly into the robot’s eyes as he said that. They were bright and moist, as a human’s would be, but it seemed to Baley that their gaze was steady and did not flicker slightly from point to point as a man’s would.

R. Daneel said, “I am hopeful that in time I will grow to understand that point of view.”

For a moment, Baley thought there was sarcasm in the sentence, then dismissed the possibility.

“In any case,” said R. Daneel, “Dr. Sarton saw clearly the fact that it was a case for C/Fe.”

“See fee? What’s that?”

“Just the chemical symbols for the elements carbon and iron, Elijah. Carbon is the basis of human life and iron of robot life. It becomes easy to speak of C/Fe when you wish to express a culture that combines the best of the two on an equal but parallel basis.”

“See fee. Do you write it with a hyphen? Or how?”

“No, Elijah. A diagonal line between the two is the accepted way. It symbolizes neither one nor the other, but a mixture of the two, without priority.”

Against his will, Baley found himself interested. Formal education on Earth included virtually no information on Outer World history or sociology after the Great Rebellion that made them independent of the mother planet. The popular book-film romances, to be sure, had their stock Outer World characters: the visiting tycoon, choleric and eccentric; the beautiful heiress, invariably smitten by the Earthman’s charms and drowning disdain in love; the arrogant Spacer rival, wicked and forever beaten. These were worthless pictures, since they denied even the most elementary and well-known truths: that Spacers never entered Cities and Spacer women virtually never visited Earth.

For the first time in his life, Baley was stirred by an odd curiosity. What was Spacer life really like?

He brought his mind back to the issue at hand with something of an effort. He said, “I think I get what you’re driving at. Your Dr. Sarton was attacking the problem of Earth’s conversion to C/Fe from a new and promising angle. Our conservative groups or Medievalists, as they call themselves, were perturbed. They were afraid he might succeed. So they killed him. That’s the motivation that makes it an organized plot and not an isolated outrage. Right?”

“I would put it about like that, Elijah. Yes.”

Baley whistled thoughtfully under his breath. His long fingers tapped lightly against the table. Then he shook his head. “It won’t wash. It won’t wash at all.”

“Pardon me. I do not understand you.”

“I’m trying to get the picture. An Earthman walks into Spacetown, walks up to Dr. Sarton, blasts him, and walks out. I just don’t see it. Surely the entrance to Spacetown is guarded.”

R. Daneel nodded. “I think it is safe to say that no Earthman can possibly have passed through the entrance illegally.”

“Then where does that leave you?”

“It would leave us in a confusing position, Elijah, if the entrance were the only way of reaching Spacetown from New York City.”

Baley watched his partner thoughtfully. “I don’t get you. It’s the only connection between the two.”

“Directly between the two, yes.” R. Daneel waited a moment, then said, “You do not follow me. Is that not so?”

“That is so. I don’t get you at all.”

“Well, if it will not offend you, I will try to explain myself. May I have a piece of paper and a writer? Thank you. Look here, partner Elijah. I will draw a big circle and label it ‘New York City.’ Now, tangent to it, I will draw a small circle and label it ‘Spacetown.’ Here, where they touch, I draw an arrowhead and label it ‘Barrier.’ Now do you see no other connection?”

Baley said, “Of course not. There is no other connection.”

“In a way,” said the robot, “I am glad to hear you say this. It is in accordance with what I have been taught about Terrestrial ways of thinking. The barrier is the only direct connection. But both the City and Spacetown are open to the countryside in all directions. It is possible for a Terrestrial to leave the City at any of numerous exits and strike out cross country to Spacetown, where no barrier will stop him.”

The tip of Baley’s tongue touched his upper lip and for a moment stayed there. Then he said, “Cross country?”

“Yes.”

“Cross country! Alone?”

“Why not?”

“Walking?”

“Undoubtedly walking. Walking would offer the least chance of detection. The murder took place early in the working day and the trip was undoubtedly negotiated in the hours before dawn.”

“Impossible! There isn’t a man in the City who would do it. Leave the City? Alone?”

“Ordinarily, it would seem unlikely. Yes. We Spacers know that. It is why we guard only the entrance. Even in the Great Riot, your people attacked only at the barrier that then protected the entrance. Not one left the City.”

“Well, then?”

“But now we are dealing with an unusual situation. It is not the blind attack of a mob following the line of least resistance, but the organized attempt of a small group to strike, deliberately, at the unguarded point. It explains why, as you say, a Terrestrial could enter Spacetown, walk up to his victim, kill him, and walk away. The man attacked through a complete blind spot on our part.”

Baley shook his head. “It’s too unlikely. Have your people done anything to check that theory?”

“Yes, we have. Your Commissioner of Police was present almost at the time of the murder—”

“I know. He told me so.”

“That, Elijah, is another example of the timeliness of the murder. Your Commissioner has co-operated with Dr. Sarton in the past and he was the Earthman with whom Dr. Sarton planned to make initial arrangements concerning the infiltration of your city by R’s such as myself. The appointment for that morning was to concern that. The murder, of course, stopped those plans, at least temporarily, and the fact that it happened when your own Commissioner of Police was actually within Spacetown made the entire situation more difficult and embarrassing for Earth, and for our own people, too.

“But that is not what I started to say. Your Commissioner was present. We said to him, ‘The man must have come cross country.’ Like you, he said, ‘Impossible,’ or perhaps, ‘Unthinkable.’ He was quite disturbed, of course, and perhaps that may have made it difficult for him to see the essential point. Nevertheless, we forced him to begin checking that possibility almost at once.”

Baley thought of the Commissioner’s broken glasses and, even in the middle of somber thoughts, a corner of his mouth twitched. Poor Julius! Yes, he would be disturbed. Of course, there would be no way for Enderby to have explained the situation to the lofty Spacers, who looked upon physical disability as a peculiarly disgusting attribute of the non-genetically selected Earthmen. At least, he couldn’t without losing face, and face was valuable to Police Commissioner Julius Enderby. Well, Earthmen had to stick together in some respects. The robot would never find out about Enderby’s nearsightedness from Baley.

R. Daneel continued, “One by one, the various exit points from the City were investigated. Do you know how many there are, Elijah?”

Baley shook his head, then hazarded, “Twenty?”

“Five hundred and two.”

“What?”

“Originally, there were many more. Five hundred and two are all that remain functional. Your City represents a slow growth, Elijah. It was once open to the sky and people crossed from City to country freely.”

“Of course. I know that.”

“Well, when it was first enclosed, there were many exits left. Five hundred and two still remain. The rest are built over or blocked up. We are not counting, of course, the entrance points for air freight.”