through the planet if you have to—they may be on the other side!" Jack cautioned, sharply.
"They aren't—it's here, on this side!" Rawlings saw it first. "Nothing much to it, though ... it looks like a relay station."
"A relay! I'll be a...." Jack started to express an unexpurgated opinion, but shut himself up. Young cubs did not swear in front of the First Lensman. "Let's land, sir, and look the place over, anyway."
"By all means."
They landed, and cautiously disembarked. The horizon, while actually quite a little closer than that of Earth, seemed much more distant because there was nothing whatever—no tree, no shrub, no rock or pebble, not even the slightest ripple—to break the geometrical perfection of that surface of smooth, hard, blindingly reflective, fiendishly hot white sand. Samms was highly dubious at first—a ground-temperature of four hundred seventy-five degrees was not to be taken lightly; he did not at all like the looks of that ultra-fervent blue-white sun; and in his wildest imaginings he had never pictured such a desert. Their space-suits, however, were very well insulated, particularly as to the feet, and highly polished; and in lieu of atmosphere there was an almost perfect vacuum. They could stand it for a while.
The box which housed the relay station was made of non-ferrous metal and was roughly cubical in shape, perhaps five feet on a side. It was so buried that its upper edge was flush with the surface; its top, which was practically indistinguishable from the surrounding sand, was not bolted or welded, but was simply laid on, loose.
Previous spy-ray inspection having proved that the thing was not booby-trapped, Jack lifted the cover by one edge and all three Lensmen studied the mechanisms at close range; learning nothing new. There was an extremely sensitive non-directional receiver, a highly directional sender, a beautifully precise uranium-clock director, and an "eternal" powerpack. There was nothing else.
"What next, sir?" Northrop asked. "There'll be an incoming signal, probably, in a couple of days. Shall we stick around and see whether it comes in from Cavenda or not?"
"You and Jack had better wait, yes." Samms thought for minutes. "I do not believe, now, that the signal will come from Cavenda, or that it will ever come twice from the same direction, but we will have to make sure. But I can't see any reason for it!"
"I think I can, sir." This was Northrop's specialty. "No space-ship could possibly hit Tellus from here except by accident with a single-ended beam, and they can't use a double-ender because it would have to be on all the time and would be as easy to trace as the Mississippi River. But this planet did all its settling ages ago—which is undoubtedly why they picked it out—and that director in there is a Marchanti—the second Marchanti I have ever seen."
"Whatever that is," Jack put in, and even Samms thought a question.
"The most precise thing ever built," the specialist explained. "Accuracy limited only by that of determination of relative motions. Give me an accurate enough equation to feed into it, like that tape is doing, and two sighting shots, and I'll guarantee to pour an eighteen-inch beam into any two foot cup on Earth. My guess is that it's aimed at some particular bucket-antenna on one of the Solar planets. I could spoil its aim easily enough, but I don't suppose that is what you're after."
"Decidedly not. We want to trace them, without exciting any more suspicion than is absolutely necessary. How often, would you say, do they have to come here to service this station—change tapes, and whatever else might be necessary?"
"Change tapes, is all. Not very often, by the size of those reels. If they know the relative motions exactly enough, they could compute as far ahead as they care to. I've been timing that reel—it's got pretty close to three months left on it."
"And more than that much has been used. It's no wonder we didn't see anything." Samms straightened up and stared out across the frightful waste. "Look there—I thought I saw something move—it is moving!"
"There's something moving closer than that, and it's really funny." Jack laughed deeply. "It's like the paddle-wheels, shaft and all, of an old-fashioned river steam-boat, rolling along as unconcernedly as you please. He won't miss me by over four feet, but he isn't swerving a hair. I think I'll block him off, just to see what he does."
"Be careful, Jack!" Samms cautioned, sharply. "Don't touch it—it may be charged, or worse."
Jack took the metal cover, which he was still holding, and by working it back and forth edgewise in the sand, made of it a vertical barrier squarely across the thing's path. The traveler paid no attention, did not alter its steady pace of a couple of miles per hour. It measured about twelve inches long over all; its paddle-wheel-like extremities were perhaps two inches wide and three inches in diameter.
"Do you think it's actually alive, sir? In a place like this?"
"I'm sure of it. Watch carefully."
It struck the barrier and stopped. That is, its forward motion stopped, but its rolling did not. Its rate of revolution did not change; it either did not know or did not care that its drivers were slipping on the smooth, hard sand; that it could not climb the vertical metal plate; that it was not getting anywhere.
"What a brain!" Northrop chortled, squatting down closer. "Why doesn't it back up or turn around? It may be alive, but it certainly isn't very bright."
The creature, now in the shadow of the 'Troncist's helmet, slowed down abruptly—went limp—collapsed.
"Get out of his light!" Jack snapped, and pushed his friend violently away; and as the vicious sunlight struck it, the native revived and began to revolve as vigorously as before. "I've got a hunch. Sounds screwy—never heard of such a thing—but it acts like an energy-converter. Eats energy, raw and straight. No storage capacity—on this world he wouldn't need it—a few more seconds in the shade would probably have killed him, but there's no shade here. Therefore, he can't be dangerous."
He reached out and touched the middle of the revolving shaft. Nothing happened. He turned it at right angles to the plate. The thing rolled away in a straight line, perfectly contented with the new direction. He recaptured it and stuck a test-prod lightly into the sand, just ahead of its shaft and just inside one paddle wheel. Around and around that slim wire the creature went: unable, it seemed, to escape from even such a simple trap; perfectly willing, it seemed, to spend all the rest of its life traversing that tiny circle.
"'What a brain!' is right, Mase," Jack exclaimed. "What a brain!"
"This is wonderful, boys, really wonderful; something completely new to our science." Samms' thought was deep with feeling. "I am going to see if I can reach its mind or consciousness. Would you like to come along?"
"Would we!"
Samms tuned low and probed; lower and lower; deeper and deeper; and Jack and Mase stayed with him. The thing was certainly alive; it throbbed and vibrated with vitality: equally certainly, it was not very intelligent. But it had a definite consciousness of its own existence; and therefore, however tiny and primitive, a mind. Although its rudimentary ego could neither receive nor transmit thought, it knew that it was a fontema, that it must roll and roll and roll, endlessly, that by virtue of determined rolling its species would continue and would increase.
"Well, that's one for the book!" Jack exclaimed, but Samms was entranced.
"I would like to find one or two more of them, to find out ... I think I'll take the time. Can you see any more of them, either of you?"
"No, but we can find some—Stu!" Northrop called.
"Yes?"
"Look around, will you? Find us a couple more of these fontema things and flick them over here with a tractor."
"Coming up!" and in a few seconds they were there.
"Are you photographing this, Lance?" Samms called the Chief Communications Officer of the Chicago.
"We certainly are, sir—all of it. What are they, anyway? Animal, vegetable, or mineral?"
"I don't know. Probably no