"I don't care what Aivas is implementing," Lessa said. "I I don't like the idea of Thread on the Yokohama. Suppose-"

"Aivas would not expose us to danger," F'lar said, giving her a soothing smile. "I find Jaxom's comments on Aivas's mandates extremely perceptive." He settled in a chair and, cradling his klah cup, leaned across the table. "I'm curious, Jaxom, and you're more in Aivas's company these days than we are: This dissection business makes me wonder if Aivas's basic imperatives conflict with ours."

"Not where the annihilation of Thread is concerned. Though sometimes I don't understand at all why he has us doing some of those endless drills and exercises. Especially now that he has been revealed as fallible."

F'lar grinned. "Did Aivas ever say he was not?"

"He likes to give the impression that he's never wrong," Lessa said in a sharp tone, looking alarmed.

Jaxom grinned. "Good teacher image, and that's necessary when he has to pound all these radical ideas into our parochial heads."

"Is his fallibility a danger to us?" F'lar asked.

"I don't really think so. I'm just commenting on it since we are private today," Jaxom went on, "and because I was so surprised when Aivas did not know that Thread's descent passed so close to the Yokohama."

F'lar blinked, absorbing that information, and Lessa's frown deepened. "Surprised? Or worried?" she asked.

"Well, it's not his fault. The ancients didn't know it, either," Jaxom said with some satisfaction.

F'lar grinned back at him. "I see what you mean, Jaxom. Makes them more human."

"And Aivas not so inhumanly perfect."

"Well, it doesn't please me," Lessa snapped. "We've believed everything Aivas has told us!"

"Don't fret, Lessa. So far Aivas has not lied to us," F'lar said.

"But if he doesn't know everything, how can we now be sure he's guiding us in the right direction with this great plan of his that's supposed to destroy Thread forever?" she demanded.

"I'm beginning to figure out what that's going to be," Jaxom said so confidently that Lessa gave him a long look. "Aivas is obviously teaching us at the rate at which he feels we'll be able to absorb the revolutionary ideas; these exercises are what we have to perfect before we can achieve his goals, which are ours, and were our ancestors'."

"And will you let us in on your conclusions?" Lessa's tone was as caustic as Jaxom had ever heard it.

"It has to do with having a Thread in the airlock and being able to analyze it unemotionally, the way Sharra, Oldive, and the others can identify bacteria and develop ways of combating infection. It has to do with becoming accustomed to moving in free-fall or in airless space, in using sophisticated equipment as if it were a third arm or an extra set of brains. That's all Aivas is, you know. An extra set of brains with a phenomenal, and infallible, memory." As Jaxom spoke, F'lar regarded him with growing respect. "And possessing a knowledge of the advanced technology we have lacked, so we couldn't do more than hold Thread at bay. But it's the dragons, and their riders, that Aivas needs to demolish Thread."

"That's obvious, considering the questions Aivas keeps asking us," Lessa put in sharply. "I'd feel happier if we knew what he wants our dragons to do." Ramoth gave a crisp bark of agreement. "I'd also like to know when he'll let the larger dragons up on the Yokohama." Both Ramoth and Mnementh bugled.

Jaxom grinned at Lessa. "Now, Lessa, don't be mean. It's not often that the greens get the jump on their bigger clutchmates. Allow them their moment of glory. At any rate, your chance comes soon. Sharra and Mirrim are monitoring the oxygen levels in the cargo bay, and as soon as the atmosphere's at the proper consistency, you'll be very welcome. Of course, you can always ask a green to fly you up there."

Emitting an angry rumble, Ramoth turned to fix Jaxom with eyes that whirled with occasional flickers of red.

"There! You know what Ramoth thinks of that idea," Lessa replied with a glint of amusement. "As if I'd consider for one moment being conveyed by a green," she added to soothe her weyrmate.

"A white?" Jaxom offered slyly.

Ramoth rumbled again, but not quite so angrily, and sneezed.

I'll be exceedingly careful carrying Lessa, Ramoth, Ruth said. I fit on the bridge, which is warmer than the cargo bay, and Lessa would see much more on the bridge than in that dark cavern.

"I heard," Lessa said when Jaxom opened his mouth to relay the message.

"I know that Aivas wants all the bronze and brown dragons to get used to free-fall conditions. The bay's the only large open area that they'll fit in. The algae farm is developing beautifully, so it shouldn't be long now."

Lessa cocked her head at Jaxom, her expression thoughtful. "Does Aivas plan for the dragons to move those ships?"

"Move the ships?" Jaxom asked, surprised.

"Why? How?" F'lar asked.

"Remember, F'lar, when Aivas insisted that the dragons should be able to move things telekinetically?"

"Dragons can only move themselves, their riders, and what they carry," F'lar said categorically. "They cannot move things they're not holding. And what good would come of moving the ships? If his plan is somehow to use the ships to blow up the Red Star, I don't see what good that would accomplish. Not as I understand his lessons in spatial mechanics."

"No more do I" Jaxom took the last gulp of his klah and rose. "Well, I've delivered my report of today's surprise."

"For which you have our gratitude," F'lar said.

"If that kind of predestruction turns out to be beneficial, we can set up a regular schedule to switch the shields," Jaxom said. "You can even have a chance at programming the mode yourselves."

"I'm sure it will be feasible, Jaxom. Anything that destroys Thread is helpful," F'lar said, rising to accompany the young Holder to the ledge.

"You won't worry about Aivas's fallibility, will you, F'lar?" Jaxom asked in a lowered voice when they were in the short corridor beyond the weyr.

"Me? No, certainly not," the Weyrleader assured him. "We've learned so much already from Aivas that, even if his vaunted Plan fails, we'll surely find our own ways of ridding Pern of Thread by the next Pass. But, somehow, Jaxom," F'lar said, gripping Jaxom's arm hard to show his implacable resolve, "I know we'll manage to do it in this Pass! Make no mistake about that! We'll do it in my lifetime!"

When the Smithcrafters returned to Landing, thoroughly elated by their time aboard the Yokohama, there was some contention over who should be allowed the opportunity to initiate the destruct mode. And of a more immediate nature, who would have the opportunity to dissect the Thread specimen.

"You'd have to choose carefully," Lytol said, "for too many folk believe that just being in the presence of Thread is followed by a terrible death. I've sent quite a few messages off to find qualified persons to perform the task, and so far, there's been no response."

"You might not get one," Piemur said. He had been waiting for Jancis's return, a sleeping Pierjan limp in his backpack. "I suppose the knowledge would be useful even if it'll become academic by the end of this Pass."

Master Robinton held up his hand. "I'll go, if no one else will."

He was so besieged with protests that he grinned. "So long as I can visit the Yokohama at some point in the very near future. And don't"-he glared about him-"tell me that my health won't permit it. I found data in the medical files on how heart patients were frequently sent to free-fall wards on satellites to recuperate. A visit to the Yokohama would, therefore, be beneficial for my health, and it could do my heart good to stab a sequence that destroyed Thread! Did one of your messages go to Oldive or Sharra, Lytol? Well, then, they're both busy folk, but they'll get back to you in time. And if one of them goes, why, I'd have my healer at hand."