said, uneasily, "I've known him since he took his doctorate at Princeton. He's a very brilliant man."
"Yes? Brilliant, huh? Why is it that all you scientific men describe one another as 'brilliant'? Aren't there any mediocre ones?"
"Many. I'm one of them. But Ralson isn't. You ask anyone. Ask Oppenheimer. Ask Bush. He was the youngest observer at Alamogordo."
"O.K. He was brilliant. What about his private life?"
Grant waited. "I wouldn't know."
"You know him since Princeton. How many years is that?"
They had been scouring north along the highway from Washington for two hours with scarcely a word between them. Now Grant felt the atmosphere change and the grip of the law on his coat collar.
"He got his degree in '43."
"You've known him eight years then."
"That's right."
"And you don't know about his private life?"
"A man's life is his own, Inspector. He wasn't very sociable. A great many of the men are like that. They work under pressure and when they're off the job, they're not interested in continuing the lab acquaintanceships."
"Did he belong to any organizations that you know of?"
"No."
The inspector said, "Did he ever say anything to you that might indicate he was disloyal?"
Grant shouted "No!" and there was silence for a while.
Then Darrity said, "How important is Ralson in atomic research?"
Grant hunched over the wheel and said, "As important as any one man can be. I grant you that no one is indispensable, but Ralson has always seemed to be rather unique. He has the engineering mentality."
"What does that mean?"
"He isn't much of a mathematician himself, but he can work out the gadgets that put someone else's math into life. There's no one like him when it comes to that. Time and again, Inspector, we've had a problem to lick and no time to lick it in. There were nothing but blank minds all around until he put some thought into it and said, 'Why don't you try so-and-so?' Then he'd go away. He wouldn't even be interested enough to see if it worked. But it always did. Always! Maybe we would have got it ourselves eventually, but it might have taken months of additional time. I don't know how he does it. It's no use asking him either. He just looks at you and says 'It was obvious', and walks away. Of course, once he's shown us how to do it, it is obvious."
The inspector let him have his say out. When no more came, he said, "Would you say he was queer, mentally? Erratic, you know."
"When a person is a genius, you wouldn't expect him to be normal, would you?"
"Maybe not. But just how abnormal was this particular genius?"
"He never talked, particularly. Sometimes, he wouldn't work."
"Stayed at home and went fishing instead?"
"No. He came to the labs all right; but he would just sit at his desk. Sometimes that would go on for weeks. Wouldn't answer you, or even look at you, when you spoke to him."
"Did he ever actually leave work altogether?"
"Before now, you mean? Never!"
"Did he ever claim he wanted to commit suicide? Ever say he wouldn't feel safe except in jail?"
"No."
"You're sure this John Smith is Ralson?"
"I'm almost positive. He has a chemical bum on his right cheek that can't be mistaken."
"O.K. That's that, then I'll speak to him and see what he sounds like."
The silence fell for good this time. Dr. Grant followed the snaking line as Inspector Darrity tossed the penknife in low arcs from hand to hand.
The warden listened to the call-box and looked up at his visitors. "We can have him brought up here, Inspector, regardless."
"No," Dr. Grant shook his head. "Let's go to him."
Darrity said, "Is that normal for Ralson, Dr. Grant? Would you expect him to attack a guard trying to take him out of a prison cell?"
Grant said, "I can't say."
The warden spread a calloused palm. His thick nose twitched a little. "We haven't tried to do anything about him so far because of the telegram from Washington, but, frankly, he doesn't belong here. I'll be glad to have him taken off my hands."
"We'll see him in his cell," said Darrity.
They went down the hard, barlined corridor. Empty, incurious eyes watched their passing.
Dr. Grant felt his flesh crawl. "Has he been kept here all the time?"
Darrity did not answer.
The guard, pacing before them, stopped. "This is the cell."
Darrity said, "Is that Dr. Ralson?"
Dr. Grant looked silently at the figure upon the cot. The man had been lying down when they first reached the cell, but now he had risen