Ellerbee nodded. "His place is right next to mine. Since we started this project Sam has practically lived here, however. He's a bachelor, and so he takes most of his meals with us."

"Seems strange--" Fenwick mused, "two men like you, way out here in the country, doing work on a level with that of the best crystal labs in the country. I should think you'd both rather be in academic or industrial work."

Ellerbee smiled and looked up through the windows to the meadows beyond.

"We're _free_ out here," he said.

Fenwick thought of Baker. "You are that," he said.

"You said you wanted to investigate the whole production process. We'll start here, if you like, and I'll show you every step in our process.

This tank contains an ordinary alum solution. We start building on a seed crystal of alum and continue until we reach a precise thickness.

Here is a solution of chrome alum. You'll note the insulated tanks. Room temperature is maintained within half a degree. The solutions are held to within one-tenth of a degree. Crystal dimensions must be held to tolerances of little more than the thickness of a molecule--"

The gimmick to fool him and cheat him. Where was it? Fenwick asked himself. Baker was sure it was here. If so, where could it be? There was no trickery in the crystal laboratory--unless it was the trickery of precision refinement of methods. Only men of great mechanical skill could accomplish what Ellerbee and his friend were doing. Genius behind the milking machine! Fenwick could almost sympathize with Baker in his hiding behind the ridiculous Index. Without some such protection a man could encounter shocks.

The crackpot fringe.

Where else would credence have been given to the phenomenon of a crystal that seemed to radiate in a nonelectromagnetic way?

But, of course, it couldn't actually be doing that. All the books, all the authorities, and the known scientific principles said it couldn't happen. Therefore, it wouldn't have happened--outside the crackpot fringe.

If Ellerbee and Atkins weren't trying to foist a deliberate deception, where were they mistaken? It was possible for such men as these to make an honest mistake. That would more than likely turn out to be the case here. But how could there be a mistake in the production of a phenomenon such as Fenwick had witnessed? How could that be produced through some error when it couldn't even be done by known electronic methods--not just as Fenwick had seen it.

Throughout the morning Ellerbee led him down the rows of tanks, explaining at each step what was happening. Sometimes Sam Atkins offered a word of explanation also, but always he stayed in the background. The two farmers showed Fenwick how they measured crystal size down to the thickness of a molecule while the crystals were growing.

A sudden suspicion crossed Fenwick's mind. "If those dimensions are so critical, how did you determine them in the first place?"

"Initially, it was a lucky accident," said Sam Atkins.

"Very lucky," said Fenwick, "if you were able to accidentally obtain a crystal of fifteen layers or so and have each layer even approximately correct."

Sam smiled blandly. "Our first crystals were not so complex, you understand. Only three layers. We thought we were building transistors, then. Later, our mathematics showed us the advantage of additional layers and gave us the dimensions."

The mathematics that Baker said a kid could poke holes in. Fenwick didn't know. He hadn't checked the math.

Where was the gimmick?

In the afternoon they took him out for field tests again. A rise behind the barn was about a mile from a similar rise on Sam Atkins' place. They communicated across that distance in all the ways, including various kinds of codes, that Fenwick could think of to find some evidence of hoax. Afterwards, they returned to the laboratory and sawed in two the crystals they had just used. Then they showed him the tests they had devised to determine the nature of the radiation between the crystals.

He did not find the gimmick.

By the end of the day Ellerbee seemed beat, as if he'd been under a heavy strain all day long. And then Fenwick realized that was actually the case. Ellerbee wanted desperately to have someone believe in him, believe in his communication device. Not only had he used all the reasoning power at his command, he had been straining physically to induce Fenwick to believe.

Through it all, however, Sam Atkins seemed to remain bland and utterly at ease, as if it made absolutely no difference to him, whatever.

"I guess we've just about shot our wad," said Ellerbee. "That's about all we've got to show you. If we haven't convinced you by now that our communicator works, I don't know how we can accomplish it."

Had they convinced him? Fenwick asked himself. Did he believe what he had seen or didn't he? He had been smug in front of Baker after the first demonstration, but now he wondered how much he had been covered by the same brush that had tarred Baker.

It wasn't easy for him to admit the possibility of nonelectromagnetic radiation from these strange crystals, radiation which could carry sight and sound from one point to another without any transducers but the crystals themselves.

"You have to step out of the world you've grown accustomed to," said Sam Atkins very quietly. "This is what we have had to do. It's not hard now to comprehend that telepathic forces of the mind can be directed by this means. This is a new pattern. Think of it as such. Don't try to cram it into the old pattern. Then it's easy."

A new pattern. That was the trouble, Fenwick thought. There couldn't really be any new patterns, could there? There was only one basic pattern, in which all the phenomena of the universe fit. He readily admitted that very little was known about that pattern, and many things believed true were false. But the Second Law of Thermodynamics. _That_ had to be true--invariably true--didn't it?

If there was a hoax, Baker would have to find it.

"I'll be back with Dr. Baker in a couple of days," Fenwick said. "After that, the one final evidence we'll need will be to construct these crystals in our own laboratories, entirely on our own, based on your instructions."

Ellerbee nodded agreement. "That would suit us just fine."

"Hypnotism," said Baker. "It sounds like some form of hypnotism, and I don't like that kind of thing. It could merit criminal prosecution."

"There's no possible way I could have been hypnotized," said Fenwick.

"These crystals--obviously it has something to do with them. But I wonder what their game is, anyway? It's hard to see where they can think they're headed."

"I don't know," said Fenwick. "But you promised to show me the gimmick if I couldn't find it in half a day. I spent a whole day out there without finding anything."

Baker slapped the desk in exasperation. "You're not really going to make me go out there and look at this fool thing, are you? I know I made a crazy promise, but I was sure you could find where they were hoaxing you if you took one look at their setup. It's probably so obvious you just stumbled right over it without even seeing it was there."

"Possibly. But you're going to have to show me."

"John, look--"

"Or, I _might_ be willing to take that Clearwater research grant without any more questions on either side."

Baker thought of the repercussions that would occur in his own office, let alone outside it, if he ever approved such a grant. "All right," he sighed. "You've got me over a barrel. I'll drive my car. I may have to stop at some offices on the other side of town."

"I might be going on, rather than coming back to town," said Fenwick. "I ought to have my car, too. Suppose I meet you out there?"

"Good enough. Say one o'clock. I'm sure that will give us more time than we need."

Baker was prompt. He arrived with an air of let's-get-this-over-as-quick-as-possible. He nodded perfunctorily as Ellerbee introduced his wife. He scarcely looked at Sam Atkins.

"I hope you've got your demonstration all set up," he said. He glanced at the darkening sky. "It looks like we might get some heavy rain this afternoon."

"We're all ready," said Ellerbee. "Sam will drive over to that little hill on his farm, and we'll go out behind the barn."

On the knoll, Baker accepted the crystal cube without looking at it.

Clenching it in his fist, he put his hand in his pocket. Fenwick guessed he was trying to avoid any direct view and thus avoid the possibility of hypnotic effects. This seemed pretty farfetched to Fenwick.

Through field gla.s.ses Sam Atkins was seen to get out of his car and walk to the top of the knoll. He stood a moment, then waved to signal his readiness.