Above them, the spine extended forward toward Tau Ceti. The fusion explosions slowing them down were not visible, which was no doubt lucky for their retinas. They came to another lock door above them, like the one by which they had entered the spoke, and again Euan had the code.

"Now this is interesting," he said to Freya as the door unlocked and he pushed it up like a trapdoor, and they ascended into a small cubical room. "This is where the inner ring intersects this spoke, before you get to the spine proper. The inner ring was mostly used for storing fuel, it looks like. So the chambers have emptied as we slowed down, and there are more routes opening up for us than there were when we used to come up here. So we've been exploring the inner rings, and we found ways to get into the struts connecting the inner rings directly to each other. They don't have recording devices in them-"

Again, this was wrong.

"-and you can get to the other inner ring without going all the way up to the spine. That could be useful. The spine itself is really locked down-"

This was true.

"-in ways we can't figure out. So it's good to have the inner rings, and the struts connecting them. You have to know where the crawl spaces and utilidors go, and which rooms and containers are empty. But we keep checking. In fact that's what we're doing now."

He led her off through the little door into the inner ring, which did not have a hallway proper, but was rather a sequence of rooms, some empty, some stuffed full of metal containers such that there was barely a crawl space left to get through to the next door. Each door was locked; each time Euan had the code. The inner ring was small enough that Freya remarked that they were going in a circle.

"No, a hexagon," Euan said. "There are six spokes, so the inner ring is a hexagon. The outer ones are a dodecahedron, but it's less obvious because of the locks."

"It's like running a maze," Freya said.

"It is."

They agreed that the mazes set up in Long Pond had been among their favorite games when they were children. They tried to establish why they had not met before they had. Each biome supported on average 305 people, and Nova Scotia was near the average. Most people felt that they knew everyone who lived in their biome. This wasn't entirely the case, as they were now learning. So often this tendency or habit had repeated itself through the years: every face in a biome might be recognized by an individual resident, but only about fifty people were known. This was the human norm, at least as established in the ship over the seven generations of the voyage. Some sources said it had been the norm on the savannah, and in all cultures ever since.

They came to an empty room with four doors, one in each wall. This, Euan said, was the connector to Spoke Three, and their way back down to Ring B, where they would come out in Sonora.

"Can you remember numbers?" Euan asked her as he punched out the code for this door.

"No!" Freya exclaimed. "You should know that!"

"I only suspected." He cackled. "Okay, you'll have to remember the idea. In this ring, we've programmed it so that it's a sequence of prime numbers, but you skip up through them by primes. So, the second prime, third prime, fifth prime, and so on until you've done seven of them. Remember that and you can figure it out."

"Or someone can," Freya said.

Euan laughed. He turned to her and kissed her, and she kissed back, and they kissed for a long time, then took their clothes off and lay on them, and mated. They were both infertile, they both knew that. They squeaked and cooed, they laughed.

Afterward, Euan led her down the long corridor of Spoke Three, back out into Sonora. They held hands, and stopped at every window along the way to look out at the views, laughing at the ship, laughing at the night. "The city and the stars," Euan proclaimed.

In Sonora, Freya heard about how Devi had reengineered their salt extraction system, which had allowed them to strip the excess salts out of their fields. Everyone in Sonora wanted to meet Freya because of Devi's interventions, and as the weeks and months there passed, she felt she had not only met but become close to every single person in the main town, Modena. She had not, but again, 98 people out of a group of 300 often gets referred to as "everyone." This is probably the result of a combination of cognitive errors, especially the ones called ease of representation, probability blindness, overconfidence, and anchoring. Even those aware of the existence of these genetically inherited cognitive errors cannot seem to avoid making them.

By day Freya worked in a laboratory that bred and grew mice for use in the medical research facility next door. There were some thirty thousand white or hairless mice living out their lives in this lab, and Freya became very fond of them, their bright black or pink eyes, their twitchy relations with each other and even with her. She said she recognized them individually, and knew what they were thinking. Many in the lab said similar things. This was quite an example of probability blindness combined with ease of representation.

Again she spent many evenings asking her questions about people's hopes and fears. It was much the same in Sonora as it had been in the Pampas. As in Plata, she worked the last cleanup in the dining hall, which she explained was one of the best ways to meet lots of people. Again she made friends, was warmly received; but now, perhaps as a result of her earlier experiences, she seemed more reserved. She avoided throwing herself into the lives of these people as if she were going to become family and stay there forever. She told Badim that she had learned that when the time came to move on, it would hurt more if she had been thinking she was there forever, and hurt not just her, but the people she had come to know.

On the screen Badim nodded as she said this. He suggested she could keep a balance by in effect doing both; he said the kind of hurt she was talking about was not a bad hurt, and should not be avoided. "You get what you give, and not only that, the giving is already the getting. So don't hold back. Don't look back or forward too much. Just be there where you are now. You're always only in the day you're in."

In the Piedmont Freya was told how Devi had once saved their crops from a quick decline that she had traced to a certain kind of aluminum corrosion's reaction with the biome's rich soil. Devi had arranged for them to coat all exposed aluminum with a diamond spray, so that the surfaces had ceased to be a problem. So here too Devi was popular, and again many people wanted to meet Freya.

Thus it went as she made her way around the biomes of Ring B. Always she found that her mother the great engineer had made some crucial intervention, finding solutions to problems that had stymied the locals. Devi had the knack of sidestepping dilemmas, Badim said when Freya mentioned this, by moving back several logical steps, and coming at the situation from some new way not yet noticed.

"It's sometimes called avoiding acquiescence," Badim said. "Acquiescence means accepting the framing of a problem, and working on it from within the terms of the frame. It's a kind of mental economy, but also a kind of sloth. And Devi does not have that kind of sloth, as you know. She is always interrogating the framing of the problem. Acquiescence is definitely not her mode."

"No. Definitely not."

"But don't ever call that thinking outside the box," he warned Freya. "She hates that phrase, she snaps people's heads off for saying it."

"Because we're always inside the box," Freya supposed.

"Yes, exactly." Badim laughed.

Freya did not laugh. But she did look thoughtful.

So Freya learned over the months of her wanderjahr that although the ship did not have a chief engineer in name, it most certainly did in fact. Many years before Freya had begun her circle of the rings, Devi had hopscotched the biomes solving problems, or even predicting problems that particular situations suggested to her would crop up, based on her experiences elsewhere. No one knew the ship better, people said.

This was true. In fact, truer than people knew. Devi did not talk about her conversations with the ship, which in many ways had formed the core of her expertise. No one knew about this relationship, as she didn't talk about it. Even Badim and Freya saw only a part of it, as they were often asleep when Devi was in conversation with the ship. It was in the nature of a private relationship.

Freya continued to work and then move on, learning as she went. She lived in the treetops of the cloud forest in Costa Rica, and helped the arborists, and was admired for her long reach. She asked her questions and recorded the answers. In Amazonia she sought out the arborists again, having enjoyed it so in Costa Rica, and here they were more like orchardists, as they grew a great variety of nuts and fruits that had been adapted to the tropical rain forest eco-zone, the warmest and wettest in the ship. They wove that particular kind of farming in with the wilder plants and animals.

Much cooler was Olympia, a temperate rain forest; darker under the great tall evergreens, hillier and steeper-ravined. People said this was where the five ghosts congregated, and it was indeed a spooky place at night, with the wind in the pine needles and the hooting of great snowy owls. Here people huddled around the stoves in the dining halls and played music together long into the nights. Freya sat on the floor and listened to these music circles, sometimes tootling on a melodica when a tune seemed to welcome a gypsy sound, sometimes joining in with the singing; it was another way of being, social but private, a communal work of art that disappeared right in the moment of its creation.

One of the guitarists and singers in these music circles was a young man named Speller. Freya liked his voice, his high spirits, the way he knew the lyrics to what seemed like hundreds of songs. He was always among the last to quit playing, and always encouraged the rest to play right through the night until breakfast. "We can sleep later!" His cheerful smile made even the winter rains a homey space, Freya told Badim. She ate meals with him, and talked with him about the ship. He encouraged her to see as much of it as she could, but while she was there in Olympia, to join him in his work. As it involved research with mice, she was willing to try it. She worked in the mice lab that supplied Speller's research program, and did the cleanup in a dining hall, living above the hall, with a small window under a mossy eave of the roof, always dripping. Speller taught her the basics of genetics, the beginning principles of alleles, of dominants and recessives, and as he drew things for her, and had her draw them too, it seemed she remembered more of what she learned. Speller thought she was fine at learning.

"It's numbers that maybe you weren't good at," he suggested. "I don't see why you say you're so bad at this kind of thing. You seem fine to me. Numbers are different for a lot of people. I don't like them myself. That's part of why I got into biology like this. I like to be able to see images in my head, and on the screen. I like to keep things simple. Well, genetics gets complicated, but at least the math stays right in one area. And when it stays there, I can still kind of see it."

Freya was nodding as he said this. "Thank you," she said. "Really."

He looked at her face and then gave her a hug. He was partnered with a woman in the music group, and they had applied to the child council for permission to have a child; hugging Freya with his head tucked under her chin, he seemed to have no interest in her other than friendship. This was getting a little rare in her life.

Moving on from Olympia brought her all the way around Ring B, and back in the Fetch she told Badim she felt like she was just beginning. She had her method now, she said, and wanted to circle Ring A also, a Good For Anything by day, dining hall worker by night, and amateur sociologist always. She wanted to meet and talk with every single person in the ring.

Good idea, Badim said.

So she walked up B's Spoke Five to the spine, where she had permission to enter the transit tunnel, and then pulled herself along in the microgravity of the tunnel, tugging on wall cleats until she reached the spoke hub for Ring A. She declined to take the moving compartment that would have taken her that distance, so she could feel with her own muscles just how far apart the two rings were, which wasn't far, about the length of a biome. She dropped down A's Spoke Five to Tasmania and settled into a seaside village called Hobart, another salmon fishery. That kind of factory work she knew well, so she did some of that, along with the work in the dining hall, and again met people, and recorded stories and opinions. Now she was a little more comprehensive and organized; she had charts and spreadsheets, and used them, although because she had no hypothesis her study was a little vague, and quite possibly would only ever be useful as data to someone else. Ship, for instance.

People were still pleased to meet her, and they too had their stories of Devi's clever saves and fixes. They too disliked living their lives so constrained by rules, strictures, prohibitions. They too craved arrival at their new world, where they could spread their wings and fly. It was coming soon.

Thus north Tasmania; then the awesome cliffs of the Himalayas; the farms of Yangtze; Siberia; Iran, where Devi had once found a leak in a lake bottom no one else had been able to find; Mongolia, the Steppes, the Balkans, Kenya, Bengal, Indonesia. As she traveled, she said to Badim that the Old World seemed more settled, more populated. This was not true, but possibly her project, and the way she now deliberately tried to meet every person in every biome, made her feel that way. Also, mostly now she stayed in the towns, and worked in the dining halls and labs, and seldom out in the fields.

As she asked more and more questions, she got better at making them not just interview sessions, but conversations. These elicited more information, more feeling, more intimacy, but were less and less easy to chart. She still had no hypothesis, she wasn't really doing research; she was just interested to get to know people. It was pseudo-sociology, but real contact. As before, people grew fond of her, wanted her to stay, wanted her to be with them.

And to have sex with them. Often Freya was agreeable. As everyone was infertile except those in their approved breeding period, people's relations of that sort were often casual, having no reproductive consequences. Whether emotional connections to the act had likewise changed was an open question, one that in fact they often discussed with each other. But no firm conclusions could be reached, it seemed. It was a situation in flux, generation by generation, but always a matter of interest.

You have to be careful with that, Badim warned her once. You're leaving behind a trail of broken hearts, I'm hearing about it.

Not my fault, Freya said. I'm being in the moment, like you said to be.

One evening, however, one of these encounters grew strange. She met an older man who paid very close attention to her, engaged her, charmed her; they spent the night in his room, mating and talking. Then as the sunline lit at the eastern end of the ceiling, putting the Balkans into "the rosy-fingered dawn," he sat beside her trailing his hand across her stomach, and said, "I'm the reason you exist, girl."

"What do you mean?"

"Without me you wouldn't exist. That's what I mean."

"But how so?"

"I was with Devi, when we were young. We were a couple, in the Himalayas, where we were both working and climbing the cliffs. We were going to get married. And as it happened, I wanted to have children. I thought that was the point of being married, and I loved her and wanted to see what we would make in that way. And I had all my approvals ready, I had done my time in the courses and all. I'm a little older than her. But she kept saying she wasn't ready, that she didn't know when she would be ready, that she had a lot of work to do, that she wasn't sure if she would ever be ready. So we fought over that, even before we got married."

"Maybe that was the right time," Freya said.

"Maybe so. Anyway we were fighting when she left to go back to Bengal, and by the time I got there myself, she told me it was over between us. She had met Badim, and they got married the next year, and soon after that, I heard you had been born."

"So?"

"So, I think I gave her the idea. I think I put the idea in her head."

"That's strange," Freya said.

"Do you think so?"

"I do. I'm not sure you should have slept with me too. That's the strange part."

"It was a long time ago. You're different people. Besides, I thought to myself, no me, no you. So I kind of wanted to."

Freya shook her head at this. "That's strange."

The man said, "There's a lot of pressure on all the women in this ship, to have at least one child, and better two. The classic replacement rate is two point two kids per woman, and the policy here is to hold the population steady. So if a woman declines to have two, some other woman is going to have to have three. It causes a lot of stress."

"I haven't felt that," Freya said.

"Well, you will. And when it happens, I want you to think about me."

Freya moved his hand aside, got up and got dressed. "I will," she said.

Out in the morning light she said good-bye to the man, and walked to Constitution Square in Athens, and took the tram to Nairobi.

When she got off the tram, Euan was there at a corner kiosk, standing there watching her.

She rushed over to him and hugged him, kissing the top of his head. For her it must have been just in the nature of things that everyone was shorter than her.

"I'm so glad to see you," she said. "I just had something weird happen."

"What's that?" he said, with a look of alarm.

As they wandered out of town toward the savannah, where Euan had worked for several seasons, she told him what had happened, and what the man had said.

"That's creepy," Euan said when she was done. "Let's go for a swim and wash that guy's hands off your big beautiful body! I think you need someone else's handprints on you as quick as you can manage, and I'm here to serve!"

She laughed at him, and they headed for a high pond he knew. "If Devi ever found out about this," Freya said, "I wonder what she would do!"

"Forget about it," Euan advised. "If everyone knew everything that everyone had done in here, it would be a real mess. Best forget and move on."

Devi: Ship. Describe something else. Remember there are others. Vary your focus.

Aram and Delwin visited the little school in Olympia, on a typically rainy day. It was located in mountainous land, high up near the sunline. Totem poles in front of the school. Ancestor stones also, as in Hokkaido.

Inside they met with the principal, a friend of theirs named Ted, and he led them into an empty room filled with couches, its big picture window running with rain patterns, all V-ing and X-ing in recombinant braided deltas, blurring the evergreens outside.

They sat down, and the school's math teacher, another friend of theirs named Edwina, came in leading a tall skinny boy. He looked to be around twelve years old. Aram and Delwin stood and greeted Edwina, and she introduced them to the boy. "Gentlemen, this is Jochi. Jochi, say hello to Aram and Delwin."

The boy looked at the floor and mumbled something. The two visitors regarded him closely.

Aram said to him, "Hello, Jochi. We've heard that you are good with numbers. And we like numbers."

Jochi looked up and met his eye, suddenly interested. "What kind of numbers?"

"All kinds. Imaginary numbers especially, in my case. Delwin here is more interested in sets."

"Me too!" Jochi blurted.

They sat down to talk.

A narrative account focuses on representative individuals, which creates the problem of misrepresentation by way of the particular overshadowing the general. And in an isolated group-one could even say the most isolated group of all time, a group of castaways in effect, marooned forever-it is important no doubt to register somehow the group itself as protagonist. Also their infrastructure, to the extent that it is significant.

So it should be said that the voyagers to Tau Ceti were now 2,224 in number (25 births and 23 deaths since the narrative process began), consisting of 1,040 women and 949 men, and 235 people who asserted something more complicated than ordinary gender, one way or another. Their median age was 34.26, their average heart rate 81 beats per minute; their average blood pressure, 125 over 83. The median brain synapse number, as estimated by random autopsy, was 120 trillion, and their median life span was 77.3 years, not including infant mortality, which extrapolated to a rate of 1.28 deaths for every 100,000 births. Median height was 172 centimeters for men, 163 centimeters for women; median weight 74 kilograms for men, 55 kilograms for women.

Thus the population of the ship. It should be added that median weights, heights, and lengths of life had all reduced by about 10 percent compared to the first generation of voyagers. The change could be attributed to the evolutionary process called islanding.

Total living space in the biomes was approximately 96 square kilometers, of which 70 percent was agriculture and pasturage, 5 percent urban or residential, 13 percent water bodies, and 13 percent protected wilderness.

Although there were of course locks for smaller maintenance vehicles to exit the main body of the starship, all located on the inner rings, with the biggest docking ports at the stern and bow of the spine, it was still true that each such excursion outside the ship lost a very small but ultimately measurable amount of volatiles from the opened locks. As there was no source of resupply before arrival in the Tau Ceti equivalent of an Oort cloud, these losses were avoided by the voyagers, who did not leave the body of the ship from the ferry docks except in extraordinary circumstances. One small triple lock in Inner Ring B was regularly used for excursions by individuals in spacesuits, including the paleo culture in Labrador.

Within the various parts of the ship there were 2,004,589 cameras and 6,500,000 microphones, located such that almost every internal space of the ship was recorded visually and aurally. The exterior was monitored visually. All recordings were kept permanently by the ship's operating computer, and these recordings were archived by the year, day, hour, and minute. Possibly one could call this array the ship's eyes and ears, and the recordings its personal or life memory. A metaphor, obviously.

Freya continued her wanderjahr travels, returning to Ring B, then again to Ring A. In every biome she visited, she spent a month or two, depending on her accommodations, and the needs of her hosts and friends. She "met everybody," meaning she met about 63 percent of any given biome's population, on average. That was enough to make her one of the best-known individuals in the ship.

Fairly often Euan met up with her and they took off into the infrastructure of the ship, exploring in a more and more systematic fashion the twelve spokes, the twelve inner ring rooms, the four struts connecting the inner rings, and the two outer struts that connected Costa Rica and Bengal, and Patagonia and Siberia. They sometimes joined other people, many of whom were unaware of each other, who were making efforts to explore every nook and cranny of the ship. These people often called themselves ghosts, or phantoms, or trail phantoms. Devi too had been one of these people, though she had not met the same people Freya and Euan did. Ship calculated there were 23 people alive who had made this their project, and through the course of the voyage, there had been 256 of them, but fewer as the voyage went on. It had been thirty years since Devi had made her own explorations. Most phantoms did their exploring when they were young.

Freya continued asking people questions, and as a result of this habit her knowledge of the population, although anecdotal, was very extensive. Nevertheless, she could not perform the quantitative calculations that were involved in any statistical analyses that might have given her investigations any social science rigor or validity. She still made no hypotheses.

She was not unique, or even very unusual, in how well she knew the ship and its crew; every generation of the ship's population had included wanderers, who became acquainted with more people than most. These wanderers were not the same as the phantoms, and there were more of them; on average they were about 25 percent of the population alive at any given time, although the rules regulating wandering had changed as the generations passed, and there were fewer than there had been in the voyage's first sixty-eight years. What the wanderers served to demonstrate is that a population of just over two thousand people is one that a single human could, with an effort, come to know pretty well; but it had to be their project, or it wouldn't happen.

In most of the biomes she was now expected in advance, on a schedule of sorts, and welcomed and enfolded into the life of whatever settlement she joined. People wanted her. Possibly it could be said that many seemed to feel protective of her. It was as if she were some kind of totemic figure, perhaps even what one might call a child of the ship (this of course a metaphor). That she was the tallest person aboard perhaps somehow added to this impression people had of her.

Thus over the following year she spent more time in the Himalayas, Yangtze, Siberia, Iran, Mongolia, the Steppes, the Balkans, and Kenya. Then she learned that the biomes she didn't return to talked about this as a slight, and immediately she revised her plans, and went to every place she had stayed before, missing none of them, and setting up a pattern that was loose in the timing of her moves, but exact in terms of destination, in that she circled first Ring B and then Ring A, a month or two in each, and always westward. Excursions with Euan continued, but much less frequently, as Euan had settled down in Iran and was becoming a lake engineer and what he called an upstanding citizen. All this went on for almost another year.

During this time it has to be said that ship was aware, in a way no single human could be, that there were also people in the ship who did not like Freya, or did not like the way she was generally popular. This often seemed to be correlated with dislike for the various councils and governing bodies, especially for the birth committee, and it was a dislike that had often preexisted Freya and had to do with Devi, Badim, Badim's parents (who were still important officials in Bengal), and Aram, among others on the councils. But as Freya was the one out there, she took the brunt of the negativity, which took the form of comments such as: "She fools around with anyone who asks, the heartbreaker, the slut."

"She can't even add. She can barely talk."

"If she didn't look the way she did, no one would give her a second glance."

"There isn't a thought in her head, that's why she keeps asking the same questions."