ordinary aitch-two-oh. See those little vents at the side? They exhaust oxygen and helium. It burns about four hundred milligrams of water per hour at maximum capacity."

Olcott had either regained control of himself or had passed the saturation point; Sam couldn't tell which. Olcott said: "Where do you put the water?"

"Why put water in it?" Sam asked coolly. "That small whirring sound you hear isn't the hydrogen-helium conversion; it's a fan blowing air through a cooling coil. Even in the Sahara Desert there's enough moisture in the air to run this baby."

"And the fan is powered—"

"... By the machine itself, naturally," said Bending. "It's a self-contained unit. Of course, with a really big unit, you might have to hire someone to hang out their laundry somewhere in the neighborhood, but only in case of emergencies."

"May I sit down?" asked Olcott. And, without waiting for Sam Bending's permission, he grabbed a nearby chair and sat. "Mr. Bending," he said, "what is the cost of one of those units?"

"Well, that one cost several hundred thousand dollars. But the thing could be mass produced for ... oh, around fifteen hundred dollars. Maybe less."

Olcott absorbed that, blinked, and said: "Is it dangerous? I mean, could it explode, or does it give out radiation?"

"Well, you have to treat it with respect, of course," Bending said. He rubbed his big hands together in an unconscious gesture of triumph. "Just like any power source. But it won't explode; that I can guarantee. And there's no danger from radiation. All the power comes out as electric current."

Sam Bending remained silent while Olcott stared at the little black box. Finally, Olcott put his hands to his face and rubbed his eyes, as though he'd been too long without sleep. When he removed his hands, his eyes were focused on Bending.

"You realize," he said, "that we can't give you any sort of contract until this has been thoroughly checked by our own engineers and research men?"

"Obviously," said Sam Bending. "But—"

"Do you have a patent?" Olcott interrupted.

"It's pending," said Bending. "My lawyer thinks it will go through pretty quickly."

Olcott stood up abruptly. "Mr. Bending, if this machine is actually what you claim it to be—which, of course, we will have to determine for ourselves—I think that we can make you a handsome—a very handsome settlement."

"How much?" Bending asked flatly.

"For full rights—millions," said Olcott without hesitation. "That would be a ... shall we say, an advance ... an advance on the royalties."

"What, no bargaining?" Bending said, in a rather startled tone.

Olcott shook his head. "Mr. Bending, you know the value of such a device as well as I do. You're an intelligent man, and so am I. Haggling will get us nothing but wasted time. We want that machine—we must have that machine. And you know it. And I know you know it. Why should we quibble?

"I can't say: 'Name your price'; this thing is obviously worth a great deal more than even Power Utilities would be able to pay. Not even a corporation like ours can whip up a billion dollars without going bankrupt. What we pay you will have to be amortized over a period of years. But we—"

"Just a minute, Mr. Olcott," Bending interrupted. "Exactly what do you intend to do with the Converter if I sell it to you?"

Olcott hesitated. "Why ... ah—" He paused. "Actually, I couldn't say," he said at last. "A decision like that would have to be made by the Board. Why?"

"How long do you think it would take you to get into production?"

"I ... ah ... frankly couldn't say," Olcott said cautiously. "Several years, I imagine..."

"Longer than that, I dare say," Bending said, with more than a touch of sarcasm. "As a matter of fact, you'd pretty much have to suppress the Converter, wouldn't you?"

Olcott looked at Bending, his face expressionless. "Of course. For a while. You know very well that this could ruin us."

"The automobile ruined the buggy-whip makers and threw thousands of blacksmiths out of work," Bending pointed out. "Such things are inevitable. Every new invention is likely to have an effect like that if it replaces something older. What do you think atomic energy would have done to coal mining if it weren't for the fact that coal is needed in the manufacture of steel? You can't let considerations like that stand in the way of technological progress, Mr. Olcott."

"Is it a question of money?" Olcott asked quietly.

Bending shook his head. "Not at all. We've already agreed that I could make as much as I want by selling it to you. No; it's just that I'm an idealist of sorts. I intend to manufacture the Converter myself, in order to make sure it gets into the hands of the people."

"I assure you, Mr. Bending, that Power Utilities would do just that—as soon as it became economically feasible for us to do so."

"I doubt it," Sam Bending said flatly. "If any group has control over the very thing that's going to put them out of business, they don't release it; they sit on it. Dictators, for instance, have throughout history, promised freedom to their people 'as soon as it was feasible'. Cincinnatus may have done it, but no one else has in the last twenty-five centuries.

"What do you suppose would have happened in the 1940s if the movie moguls of Hollywood had had the patent rights for television? How many other inventions actually have been held down simply because the interested parties did happen to get their hands on them first?

"No, Mr. Olcott; I don't think I can allow Power Utilities to have a finger in this pie or the public would never get a slice of it."

Olcott stood up slowly from the chair. "I see, Mr. Bending; you're quite frank about your views, anyway." He paused. "I shall have to talk this over with the Board. There must be some way of averting total disaster. If we find one, we'll let you know, Mr. Bending."

And that was it. That was the line that had stuck in the back of Bending's mind for two weeks. If we find a way of averting total disaster, we'll let you know, Mr. Bending.

And they evidently thought they'd found a way. For two weeks, there had been phone calls from officers of greater or lesser importance in Power Utilities, but they all seemed to think that if they could offer enough money, Sam Bending would capitulate. Finally, they had taken the decisive step of stealing the Converter. Bending wondered how they had known where it was; he had taken the precaution of concealing it, just in case there might be an attempt at robbery, and using it as power supply for the lab had seemed the best hiding place. But evidently someone at Power Utilities had read Poe's "Purloined Letter," too.

He smiled grimly. Even if the police didn't find any clues leading them to the thieves who'd broken into his lab, the boys at Power Utilities would find themselves in trouble. The second they started to open the Converter, it would begin to fuse. If they were quick, whoever opened it should be able to get away from it before it melted down into an unrecognizable mass.

Sam Bending took the tape from the playback and returned it to his files.

He wondered how the Power Utilities boys had managed to find where the Converter was. Checking the power that had been used by Bending Consultants? Possibly. It would show that less had been used in the past two weeks than was normally the case. Only the big building next door was still using current from the power lines. Still, that would have meant that they had read the meter in the last two weeks, which, in turn, meant that they had been suspicious in the first place or they wouldn't have ordered an extra reading.

On the other hand, if—

The visiphone rang.

It was the phone with the unregistered number, a direct line that didn't go through his secretary's switchboard.

He flipped it on. "Yes?" He never