"Haynes!" he thought crisply into his Lens. "Kinnison calling!"

"Haynes acknowledging!" a thought instantly snapped back. "Congrat—"

"Hold it! We're not done yet! Have every ship in the Fleet go free at once. Have them all, except yours, put out full-coverage screens, so that they can't look at or think into this Base."

A moment passed. "Done!"

"Don't come in any closer—I'm on my way out there to you. Have your ship block every band except your personal frequency, which you and I are now on, and caution all Lensmen aboard with you to stay off that channel until further notice. Now as to you, personally, I don't like to seem to be giving orders to the Admiral of the Fleet, but it may be quite essential that you concentrate upon me, and think of nothing else, for the next few minutes."

"Right! I don't mind taking orders from you."

"QX. Now we can take things a bit easier." Kinnison had so arranged matters that no one except himself could think into that stronghold, and he himself would not. He would not think into that tantalizing enigma, nor toward it, nor even of it, until he was completely ready to do so. And how many persons, I wonder, really realize just how much of a feat that was? Realize the sort of mental training that required?

"How many gamma-zeta tracers can you put out, chief?" Kinnison asked then, more conversationally.

A brief consultation; then, "Ten in regular use. By tuning in all our spares we can put out sixty."

"At two diameters' distance forty-eight fields will surround this planet at one-hundred-percent overlap. Please have that many set that way. Of the other twelve, set three to go well outside the first sphere—say at four diameters out—covering the line from this planet to Lundmark's Nebula. Set the last nine to be thrown out as far as you can read them accurately to only the first decimal on your screens, centering on the same line. Not much overlap is necessary on these backing fields—bare contact is enough. Release nothing, of course, until I get there. And while the boys are setting things up, you might go inert—it's safe enough now—so that I can match your intrinsic velocity and come aboard."

There followed the maneuvering necessary for one inert body to approach another in space, then Kinnison's incredible housing of steel was hauled into the airlock 

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