Kit threw a switch. There was a wrenching, twisting shock, followed by a deceleration exactly as sickening as the acceleration had been. It ceased. They were in that enigmatic nth space which each of the older men remembered so well; in which so many of their "natural laws" did not hold. Time still raced, stopped, or ran backward, seemingly at whim; inert bodies had intrinsic velocities far above that of light—and so on. Each of those men, about to be marooned of his own choice in this utterly hostile environment, drew a deep breath and squared his shoulders as he prepared to disembark.

"That's computation, Kit!" Kinnison exclaimed after one glance into a plate. "That's the same planet we worked on before, right there. All our machines and stuff, untouched. If you'd figured it any closer, it'd have been a collision course. Are you dead sure, Kit, that everything's all set?"

"Dead sure, Dad, in full duplicate, and Thorndyke and Henderson both know the board."

"QX. Well, fellows, I'd like to stay here with you, and so would Kit, but we've got chores to do. I don't have to tell you to be careful, but I'm going to, anyway. BE CAREFUL! And as soon as you get done, come back home just as fast as Klono will let you. Clear ether, fellows!"

"Clear ether, Kim!"

Lensman father and Lensman son boarded their speedster and left. They traversed the tube and emerged into normal space, all without a word.

"Kit," the older man ground out, finally. "This gives me the colly wobblies, no less. Suppose some of them—or all of them—get killed out there? Is it worth it? I know it's my own idea, but will we need it badly enough to take the chance?"

"We will, Dad. Mentor says that we will."

And that was that.

XXIV.