or something like that, and they were heading out to some scientific conference on
Ganymede and Quentin wouldn't even announce the title of his paper.'
'It all fits.' Brandon resumed his rapid pacing. 'He had a new, great discovery, which he was keeping absolutely secret, because he was going to spring it on the Ganymede conference and get maximum drama out of it. He wouldn't come out of his cabin because he probably thought Hester would pump him-and Hester would, I'll bet. And then the ship hittherock and Quentin was killed. Trans-space Insuranceinvestigated, got rumors of this new discovery and figured that if they gained control of it they could make back their losses and plenty more. So they took ownership of the ship and have been hunting for Quentin's papers among the pieces ever since.'
Moore smiled, in absolute affection for the other man. 'Mark, that's a beautiful theory. The whole evening is worth it, just watching you make something out of nothing.'
'Oh, yeah? Something out of nothing? Let's ask Multivac again. I'll pay the bill for it this month.'
'It's all right. Be my guest. If you don't mind, though, I'm going to bring up the bottle of Jabra. I want one more little shot to catch up with you.'
'Me, too,' said Shea.
Brandon took his seat at the typewriter. His fingers trembled with eagerness as he tapped out: What was the nature of Dr. Horace Quentin's final investigations?
Moore had returned with the bottle and glasses, when the answer came back, on white paper this time.
The answer was long and the print was fine, consisting for the most part of references to scientific papers in journals twenty years old.
Moore went over it. 'I'm no physicist, but it looks to me as though he was interested in optics.'
Brandon shook his head impatiently. 'But all that is published. We want something he had not published yet.'
'We'll never find out anything about that.' The insurance company did.'
That's just your theory.'
Brandon was kneading his chin with an unsteady hand. 'Let me ask Multivac one more question.'
He sat down again and tapped out: Give me the name and tube number of the surviving colleagues of Dr. Horace Quentin from among those associated with him at the University on whose faculty he served.
'How do you know he was on a University faculty?' asked Moore.
'If not, Multivac will tell us.'
A slip popped out. It contained only one name. Moore said, 'Are you planning to call the man?'
'I sure am,' said Brandon. 'Otis Fitzsimmons, with a Detroit tube number. Warren, may I-'
'Be my guest, Mark. It's still part of the game.'
Brandon set up the combination on Moore's tube keyboard. A woman's voice answered. Brandon asked for Dr. Fitzsimmons and there was a short wait. Then a thin voice said, 'Hello.' It sounded old.
Brandon said, 'Dr. Fitzsimmons, I'm representing Trans-space Insurance in the matter of the late Dr. Horace Quentin-'
'For heaven's sake, Mark,' whispered Moore, but Brandon held up a sharply restraining hand.
There was a pause so long that a tube breakdown began to seem possible and then the old voice said,
'After all these years? Again?'
Brandon snapped his fingers in an irrepressible gesture of triumph. But he said smoothly, almost glibly,
'We're still trying to find out, Doctor, if you have remembered further details about what Dr. Quentin might have had with him on that last trip that would pertain to his last unpublished discovery.'
'Well'-there was an impatient clicking of the tongue- 'I've told you, I don't know. I don't want to be bothered with this again. I don't know that there was anything. The man hinted, but he was always hinting about some gadget or other.'
'What gadget, sir?'
'I tell you I don't know. He used a name once and I told you about that. I don't think it's significant.'
'We don't have the name in our records, sir.'
'Well, you should have. Uh, what was that name? An optikon, that's it.'
'With a K?'
'C or K. I don't know or care. Now, please, I do not wish to be disturbed again about this. Good-bye.'
He was still mumbling querulously when the line went dead. Brandon was pleased.
Moore said, 'Mark, that was the stupidest thing you could have done. Claiming a fraudulent identity on the tube is illegal. If he wants to make trouble for you-'
'Why should he? He's forgotten about it already. But don't you see, Warren? Trans-space has been asking him about this. He kept saying he'd explained all this before.'
All right. But you'd assumed that much. What else do you know?'
'We also know,' said