“IT’S GONE, GOVERNOR,” said Davlo Lentrall. “Everything I’ve ever worked on is gone.” He was glad to be speaking over an audio-only link to the governor. Kresh had called on an audio link because it was easier to maintain a secure line that way, but Davlo didn’t care about that. He was simply glad he did not have to show his face. It was bad enough that Kresh could hear the panic in his voice. He wouldn’t want anyone to see him this way. Davlo Lentrall paced frantically up and down in front of his comm center. “All my core files, all the backups, everything.”

“Take it easy, son. Easy now. There must be some way to retrieve it all. I thought the system was designed to make it impossible to lose things irretrievably.”

Davlo tried to calm himself. Kresh had called from-from wherever he was-just as Davlo had finally, absolutely confirmed that all was lost. It was no easy thing to talk to the planetary leader when he was at his lowest ebb.

“Normally, yes, sir. But this wasn’t an accident. This was sabotage. Five minutes after I discovered that my files were gone, I got a call from University Security. Someone broke into my office there and threw in a firebomb. They think there were at least two separate break-ins. By the end of the second intrusion, everything that wasn’t stolen was bummed. They say there’s nothing left. Nothing at all. All my notes and work-including the comet data. The comet coordinates, the tracking information, the orbital projections-everything.”

“Burning stars,” Kresh’s voice half whispered. “Maybe that whole escapade at Government Tower was just a diversion.”

Davlo laughed bitterly. “Trying to kidnap me, perhaps kill me, a mere diversion for stealing my life’s work?”

“I don’t mean to sound harsh, son, but yes. Exactly that. I grant that you would have a different point of view-but for the rest of the world, right now, your life’s work is of far greater importance than your life. And you’re sure everything is gone? Irretrievably gone?”

“Everything. “

“I see.”

“Governor Kresh? Who did this? Was it the Settlers?”

“Probably,” said Kresh. “But it could have been anyone who wanted to keep the comet from coming down. Right now that doesn’t matter. Right now we have to deal with the situation, not worry about how the situation came to be.”

“That’s not going to be easy, sir. I’ll try.”

There was silence on the line for a moment. “All right, then. Your computer files containing your plans are gone. We have to set to work at once to get them back-or at least get the main part of them back. I’ve seen enough of what the twin control units can do to be sure they could start from the basics of your plan and reconstruct it-probably in greater detail than you had to start with.”

“How very kind of you to say so,” Davlo muttered.

“I meant no offense to your work,” Kresh said. “The control units are designed for this kind of job, and they have the capacity to oversee the climate of an entire planet. Of course they can do more detailed projections than one man working alone, no matter how gifted-especially when that man is working outside his field of expertise. And I might add that no robot or computer or control unit found that comet and saw what it might mean to this planet.”

Davlo sat down in the chair facing the comm unit, folded his arms over his chest, and stared down at the floor. “You’re flattering me,” he said. “Trying to soothe me, make me feel better.”

“Yes, I am,” Kresh agreed, his voice smooth and calm. “Because I need you, and I need you right now. As I was about to say, the control units can reconstruct and refine your plan for targeting the comet-but we need you in your field of expertise.”

“Sir? I don’t understand.”

“Son, we need you to look through your telescope again and relocate that comet. And fast.”

Davlo took a deep breath, shook his head, and kept his gaze fixed on the floor. “Sir, I never found the comet in the first place.”

“What! Are you saying this has all been some kind of hoax? Some kind of fraud?”

“No! No, sir. Nothing like that. I didn’t mean it that way. I meant that the computers found the comet. Automated telescopes found it while doing preprogrammed scans. I’ve never looked through a telescope myself in my life.”

Again, silence on the line, but this time Davlo spoke first. “All the data is gone, sir. Without my computer files, without my written notes, without the log files-there is simply no way at all I can find that comet again in time.”

“But the thing is kilometers across! It’s practically headed straight for the planet right now! How hard could it be to spot?”

Davlo Lentrall let out a tired sigh. The man was right. It shouldn’t be hard at all. How could he explain that it would be all but impossible? “It is extremely hard to spot, sir. It is coming straight for us, and that is part of the problem. Normally we track a comet by spotting its motion against the night sky. Comet Grieg appears to be all but stationary. Not quite motionless, but close. And while it’s a relatively large cometary body, even a big comet is rather small from tens of millions of kilometers away. It also happens to be a rather dark body-and at its present distance, it has a very low apparent magnitude.”

“You’re saying it’s too dim to see? But you saw it before-or at least the computers and the telescopes did.”

“It’s not impossible to see. But it’s very dim and small and far away and with a very small lateral motion. And it’s not just a question of seeing it once. We have to get repeated, accurate measures of its position and trajectory before we can reconstruct the orbit.”

“But what about when it gets closer? Won’t it develop a tail and all the rest of it? Surely that will make it easier to spot.”

“By which time it will be too late. Grieg is a dark-body comet. The comet will be too close, and if it has developed much of a tail, that will mean it is starting to melt. If it gets too warm and melts too much, it will be too fragile to hold together during the course correction. Part of the plan I hadn’t worked out yet was shielding from the sun. I was going to come up with some kind of parasol, a shield to keep the sunlight off.”

“But there’s a chance,” said Kresh. “At least there is some sort of chance we could reacquire the comet if we tried.” There was a brief moment of quiet again before the governor’s voice spoke again. “Here’s what we’re going to do,” he said. “We’re going to keep everything moving forward, based on the assumption that we do reacquire the comet, and that we will decide to go forward with the diversion and the impact. We need to move forward on as many fronts as possible, as fast as possible, and I need some work out of you, right now.

“First I want you to set down the closest approximations you can of the mass, size, position, and trajectory of Comet Grieg. Even rough figures will give us someplace to start in planning for the impact itself. Send that information at once to my data mailbox. Then you are going to get to work at once organizing a search to reacquire Comet Grieg. I will instruct your superiors to give you whatever resources and personnel you need for the job. Tell them as much as you can about the comet. But get that started-and let someone else run it. Because I want you to get to work trying to recover your computer files. Maybe they’re not as lost as we think. There must be something, somewhere-at least enough to give some leads to the team doing the telescope search. Is that clear?”

“Yes, sir. Sir-if I might ask a question?”

“Yes, of course, Dr. Lentrall.”

“I get the impression that you’ve become more convinced that the plan might work.”

“That I have, Dr. Lentrall. I’ve seen and heard quite a bit here about your plan. Enough to make me think we just can’t live without it. Was there anything else?”