Ryger said, “If you don’t want advertisement, why do you tell us?”

“You’re different. You’re my friends, my classmates. You went out into space and left me behind.”

“That wasn’t a matter of choice,” objected Kaunas in a thin, high voice.

Villiers ignored that. He said, “So I want you to know now. What will work for a mouse will work for a human. What will move something ten feet across a lab will move it a million miles across space. I’ll be on the Moon, and on Mercury, and on Ceres and anywhere I want to go. I’ll match every one of you and more. And I’ll have done more for astronomy just teaching school and thinking, than all of you with your observatories and telescopes and cameras and spaceships.”

“Well,” said Talliaferro, “I’m pleased. More power to you. May I see a copy of the paper?”

“Oh, no.” Villiers’ hands clenched close to his chest as though he were holding phantom sheets and shielding them from observation. “You wait like everyone else. There’s only one copy and no one will see it till I’m ready. Not even Mandel.”

“One copy,” cried Talliaferro. “If you misplace it—”

“I won’t. And if I do, it’s all in my head.”

“If you—” Talliaferro almost finished that sentence with “die” but stopped himself. Instead, he went on after an almost imperceptible pause, “—have any sense, you’ll scan it at least. For safety’s sake.”

“No,” said Villiers, shortly. “You’ll hear me day after tomorrow. You’ll see the human horizon expanded at one stroke as it never has been before.”

Again he stared intently at each face. “Ten years,” he said. “Good-by.”

“He’s mad,” said Ryger explosively, staring at the door as though Villiers were still standing before it.

“Is he?” said Talliaferro thoughtfully. “I suppose he is, in a way. He hates us for irrational reasons. And, then, not even to scan his paper as a precaution—”