They faced each other in Seldon’s private office, his “thinking place,” as he called it. There, he had spent uncounted hours trying to think his way past and through the complexities of Imperial and Trantorian government.

He said, “Have you read much about the recent breakdowns we’ve been having in planetary services, Raych?”

“Yes,” said Raych, “but you know, Dad, we’ve got an old planet here. What we gotta do is get everyone off it, dig the whole thing up, replace everything, add the latest computerizations, and then bring everyone back—or at least half of everyone. Trantor would be much better off with only twenty billion people.”

“Which twenty billion?” asked Seldon, smiling.

“I wish I knew,” said Raych darkly. “The trouble is, we can’t redo the planet, so we just gotta keep patching.”

“I’m afraid so, Raych, but there are some peculiar things about it. Now I want you to check me out. I have some thoughts about this.”

He brought a small sphere out of his pocket.

“What’s that?” asked Raych.

“It’s a map of Trantor, carefully programmed. Do me a favor, Raych, and clear off this tabletop.”

Seldon placed the sphere more or less in the middle of the table and placed his hand on a keypad in the arm of his desk chair. He used his thumb to close a contact and the light in the room went out while the tabletop glowed with a soft ivory light that seemed about a centimeter deep. The sphere had flattened and expanded to the edges of the table.

The light slowly darkened in spots and took on a pattern. After some thirty seconds, Raych said in surprise, “It is a map of Trantor.”

“Of course. I told you it was. You can’t buy anything like this at a sector mall, though. This is one of those gadgets the armed forces play with. It could present Trantor as a sphere, but a planar projection would more clearly show what I want to show.”

“And what is it you want to show, Dad?”

“Well, in the last year or two, there have been breakdowns. As you say, it’s an old planet and we’ve got to expect breakdowns, but they’ve been coming more frequently and they would seem, almost uniformly, to be the result of human error.”

“Isn’t that reasonable?”

“Yes, of course. Within limits. This is true, even where earthquakes are involved.”

“Earthquakes? On Trantor?”

“I admit Trantor is a fairly nonseismic planet—and a good thing, too, because enclosing a world in a dome when the world is going to shake itself badly several times a year and smash a section of that dome would be highly impractical. Your mother says that one of the reasons Trantor, rather than some other world, became the Imperial capital is that it was geologically moribund—that’s her unflattering expression. Still, it might be moribund, but it’s not dead. There are occasional minor earthquakes—three of them in the last two years.”

“I wasn’t aware of