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The TerReForm base for the Central American isthmus was Magdalena. This was a large island in about the same place as the former Islas Marías. Pre-Zero, this had been an archipelago off the west coast of Mexico, somewhat south of the tip of Baja California. The Hard Rain had reforged it into a single island with a few rocks and reefs scattered around, useful for propagating life that was designed to occupy shallow water and tidal zones. The lack of a moon meant that New Earth’s tides were caused entirely by the gravity of the sun, which made them weaker and more closely synchronized with the cycle of night and day. Because tidal zones were thought to have disproportionate importance to the ecosystems of land and sea alike, much TerReForm brainpower had been focused on them, and the low-lying banks of wave-washed rubble around Magdalena had become spawning grounds, not just for fish and birds and crustaceans, but for researchers with advanced degrees. Doc himself had spent ten years of his life here, sloshing through tide pools with buckets and shovels.

Ty would not have thought it possible, but Kath Two got them there with a little bit of daylight to spare, in a single day’s flying. Around midday she mumbled something about a noteworthy jet stream perturbation, and the possibility (which to her was apparently quite enticing) of catching a stratospheric wave. To Ty it might as well have been “eye of newt, and toe of frog, wool of bat, and tongue of dog.” Her next words, though, had been admirably clear: “Hang on.” Drinks were spilled and barf bags reached for all around the cabin. Oxygen masks dropped from the ceiling as the glider shot up through the tropopause, and the fuselage creaked and keened as Kath Two trimmed it to peel energy from some kind of fascinating upper-atmosphere anomaly. Several hours later, when, after another understated warning, she banked it nearly upside down and let it dive toward the faintly wrinkled blue water of the Pacific, they had covered many hundreds of kilometers beyond their original flight plan, and their only real problem was dumping energy so that they could make a landing, as opposed to a crater, on Magdalena. The place had a flynk barn, but the loop wasn’t operating at the moment, and anyway there was no reason to attempt a midair rendezvous with a flying chain when a simple airstrip was available nearby. An impressive whine sounded through the airframe as Kath Two turned on a pair of turbines in its belly that took in air through scoops and converted its energy to electrical power that was then stored. The next time the glider took off, the whole system could be run backward, driving the turbines as jets to provide some initial energy boost. It wasn’t necessary, but it was a way to slow the glider down, and it was a courtesy for the next pilot. Owing to some low banks of clouds, not much about the last phase of the flight made sense to its passengers, but at length the glider shot out the bottom of that weather system and suddenly Magdalena was below them, lit up on its west side by the last of the setting sun. On the purple skin of the sea, thin arcs of foam materialized as incoming wave fronts sensed the bottom or wrapped around submerged reefs. Doc had moved to a window seat so that he could peer down at his old stomping grounds, and in the suddenly quiet cabin Ty was able to hear him remarking on various installations along the shore. Most of these just looked to Ty like picket lines of pilings and ragged shanties of fishnet and plastic. But as Ty had been explaining to Langobard earlier, his Sooner ancestors had made a living from meaner tech than that, and so he did not think less of the scientists who had built them. The wildlife habitats, arboretums, and gardens tiling Magdalena’s western slopes looked a little closer to what a member of the general public might expect from a major TerReForm base, and the buildings clustered at the end of the airstrip were as respectable a town as it was possible to find anywhere on the surface. Ramps, stairs, and a long zigzagging road connected it to a harbor a couple of hundred meters below, where, at a glance, perhaps eight significant vessels, a giant flying boat called an ark, and many smaller boats were moored. They enjoyed a brief panorama of the waterfront before the final bank-around and approach took them out of view behind some hills. After the excitements of the flight, the landing was dull, and Ty suspected that Kath Two had just turned it over to an algorithm. The glider touched down on the single wheel that peeked out from the underside of its fuselage. Before it had slowed to the point where it might teeter sideways, a couple of specialized high-speed grabbs had caught up with it, moving in the somewhat disturbing prancing/scuttling gait that they used at such times, and caught hold of the wingtips. They escorted it to a field of tie-downs off to the side of the airstrip. Kath Two, relieved of responsibility, rolled over onto her back, stretched, and rubbed her eyes. Ty was eager to disembark, but he knew that Doc would be the first out the door. He knew this because he could see a considerable welcoming party walk-jogging toward them.

Ariane was looking at the same thing. Ty did not understand why she would be so secretive on Cradle and in Cayambe, only to land them in the one location on the surface where Doc was most famous. He guessed she had her reasons, worked out in painstaking detail and never to be shared with the likes of Ty. They had to land somewhere en route to whatever their final destination was, and perhaps TerReForm was enough of a closed community that the buzz Doc would create by landing here would not extend much beyond Magdalena.

ABOUT TWENTY YEARS AGO — AROUND THE TIME OF HIS HUNDREDTH birthday — Dr. Hu Noah (like all Ivyns, he put his family name first, because it was somehow supposed to be more logical) had made a conscious decision to give up on trying to explain to younger people just how little he had actually changed with age. It didn’t really matter that these people were making all sorts of wrong assumptions about how his mind and his body were changing. What mattered to them, he had finally come to realize, was that they believed such things to be true. It was more important to them to believe it than it was for him to explain the facts of the situation, and so he had decided to let them think what they thought and to try to find constructive ways to use it. Sometimes this meant sitting so quietly that they forgot he was there and began speaking of him in the third person, using Remembrance as a sort of interpreter. Sometimes he could astonish by speaking up, making it clear that he had been following the conversation all along. Or he would stand up — an action that was always described later, by witnesses, as “springing to his feet” even though it was nothing of the sort — and begin to move about under his own power, which many who didn’t know him well seemed to consider miraculous. Because Remembrance was always by his side, and his grabb was always scuttling along beside him, giving him a sort of universal banister and grab-rail, people assumed he was more unsteady than was really the case. In fact, this support system was nothing more than a simple way of playing the odds. A fall could cripple or kill him; why not have the grabb handy? And Remembrance, though she was assumed by most to be a health care worker, was really more of a general-purpose aide de camp and, to put it crudely, a cowcatcher for turning human obstacles out of his path.

He had had many conversations during his long life. Some were fascinating and stayed with him more than a century later. Others were less so. As a younger man he had tolerated those as part of the cost of doing business — a sort of tax that all people must pay in order to take part in civilized society. When he had turned one hundred, he had decided to stop paying that tax. Henceforth he would engage only in conversations that really interested him — which, with a few exceptions for close friends and family members, meant conversations with a purpose. Remembrance carried in her head a list of all the people whom Doc might actually care to have a conversation with, and knew how to turn the others aside, typically by playing the age card. The list changed slowly over time, and certain people, some of whom were quite important, were occasionally discomfited to find that they were no longer on it. The list had been written down only once, twenty years ago, when Doc and Remembrance had established their relationship. She had committed it to memory and destroyed it. It now existed only in her — not Doc’s — head. Perhaps 10 percent of the original names remained. Many of them had died. The others had been crossed off, almost always without any volition from Doc. Remembrance stayed off to one side during his conversations, on the pretext that she might be needed to intervene medically. But what she was really doing was following the dialogue and monitoring Doc for signs, not that his heart was failing or his medication wearing off, but that he was bored. Sometimes, during their first decade together, he had gone so far as to glance in her direction and catch her eye for a moment while his interlocutor wasn’t looking, and this had been enough to eliminate that person from the list, but since then it had no longer been necessary. In many cases Remembrance had made what Doc had, at the time, considered to be mistakes in her performance of this duty, but on further consideration he had seen what she had seen quicker, and come to agree with her.

Exceptions had to be made for cases like this one, where they had to work with the five other members of the Seven. Some, but not all, of these might have made their way onto Remembrance’s list. He had tried to select people such as Kath Two whom he enjoyed talking to, but the others were strangers to him. Ariane Casablancova showed amusing pretention in sitting next to him whenever she could, acting as a gatekeeper between Doc and the remaining four. She took at face value Remembrance’s cover story. Had Remembrance not been a Camite, she might have taken it wrong, seeing it as an usurpation of her prerogatives. But that plus the fact that she had lifetime tenure — a sort of platonic marriage to Doc — made Ariane’s behavior at most a source of dry amusement.

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