THE ANSWER THAT SATISFIED

Turbor laughed suddenly—laughed in huge, windy gusts that bounced ringingly off the walls and died in gasps. He shook his head, weakly, and said, “Great Galaxy, this goes on all night. One after another, we put up our straw men to be knocked down. We have fun, but we don’t get anywhere. Space! Maybe all planets are the Second Foundation. Maybe they have no planet, just key men spread on all the planets. And what does it matter, since Darell says we have the perfect defense?”

Darell smiled without humor. “The perfect defense is not enough, Turbor. My Mental Static device is far from perfect, and even if it were, it is only something that keeps us in the same place. We cannot remain forever with our fists doubled, frantically staring in all directions for the unknown enemy. We must know not only how to win, but whom to defeat. And there is a specific world on which the enemy exists.”

“Get to the point,” said Anthor, wearily. “What’s your information?”

“Arcadia,” said Darell, “sent me a message, and until I got it, I never saw the obvious. I probably would never have seen the obvious. Yet it was a simple message that went: ‘A circle has no end.’ Do you see?”

“No,” said Anthor, stubbornly, and he spoke, quite obviously, for the others.

“A circle has no end,” repeated Munn, thoughtfully, and his forehead furrowed.

“Well,” said Darell, impatiently, “it was clear to me—What is the one absolute fact we know about the Second Foundation, eh? I’ll tell you! We know that Hari Seldon located it at the opposite end of the Galaxy. Homir Munn theorized that Seldon lied about the existence of the Foundation. Pelleas Anthor theorized that Seldon had told the truth that far, but lied about the location of the Foundation. But I tell you that Hari Seldon lied in no particular; that he told the absolute truth.

“But, what is the other end? The Galaxy is a flat, lens-shaped object. A cross section along the flatness of it is a circle, and a circle has no end—as Arcadia realized. We—we, the First Foundation—are located on Terminus at the rim of that circle. We are at an end of the Galaxy, by definition. Now follow the rim of that circle and find the other end. Follow it, follow it, follow it, and you will find no other end. You will merely come back to your starting point—

“And there you will find the Second Foundation.”

“There?” repeated Anthor. “Do you mean here?”

“Yes, I mean here!” cried Darell, energetically. “Why, where else could it possibly be? You said yourself that if the Second Foundationers were the guardians of the Seldon Plan, it was unlikely that they could be located at the so-called other end of the Galaxy, where they would be as isolated as they could conceivably be. You thought that Kalgan’s distance was more sensible. I tell you that that is