Hackworth turned around to get Fiona's attention, then pointed something out: a second person, making his way along the base of the cliff, out of sight of the woman above. Moving carefully and quietly, he eventually reached the shelter of the overhang. He gingerly took the dangling end of the rope and tied it to something, apparently a piece of hardware fixed into the rock. Then he left the way he had come, moving silently and staying close to the cliff.

The woman remained still and silent for several minutes, checking her watch more and more frequently.

Finally she backed several paces away from the edge of the cliff, took her hands out of her jacket pockets, seemed to draw a few deep breaths, then ran forward and launched herself into s.p.a.ce. She screamed as she did it, a scream to drive out her own fear.

The rope ran through a pulley fixed near the top of the cliff. She fell for a few meters, the rope tightened, the man's knot held, and the rope, which was somewhat elastic, brought her to a firm but not violent stop just above the wicked pile of rubble and snags at the base of the cliff. Swinging at the end of the rope, she grabbed it with one hand and leaned back, baring her throat to the mist, allowing herself to dangle listlessly for a few minutes, basking in relief.

A third person, previously unseen, emerged from the trees. This one was a middle-aged man, and he was wearing a jacket that had a few vaguely official touches such as an armband and an insignia on the breast pocket. He walked beneath the dangling woman and busied himself for a few moments beneath the overhang, eventually releasing the rope and letting her safely to the ground. The woman detached herself from the rope and then the harness and fell into a businesslike discussion with this man, who poured both of them hot drinks from a thermal flask.

"Have you heard of these people? The Reformed Distributed Republic," Hackworth said to Fiona, still keeping his voice low.

"I am only familiar with the First."

"The First Distributed Republic doesn't hang together very well-in a way, it was never designed to. It was started by a bunch of people who were very nearly anarchists. As you've probably learned in school, it's become awfully factionalized."

"I have some friends in the F.D.R.," Fiona said.

"Your neighbors?"

"Yes."

"Software khans," Hackworth said. "The F.D.R. works for them, because they have something in common-old software money. They're almost like Victorians-a lot of them cross over and take the Oath as they get older. But for the broad middle cla.s.s, the F.D.R. offers no central religion or ethnic ident.i.ty."

"So it becomes balkanized."

"Precisely. These people," Hackworth said, pointing to the man and the woman at the base of the cliff, "are R.D.R., Reformed Distributed Republic. Very similar to F.D.R., with one key difference."

"The ritual we just witnessed?"

"Ritual is a good description," Hackworth said. "Earlier today, that man and that woman were both visited by messengers who gave them a place and time-nothing else. In this case, the woman's job was to jump off that cliff at the given time. The man's job was to tie the end of the rope before she jumped. A very simple job-"

"But if he had failed to do it, she'd be dead," Fiona said.

"Precisely. The names are pulled out of a hat. The partic.i.p.ants have only a few hours' warning. Here, the ritual is done with a cliff and a rope, because there happened to be a cliff in the vicinity. In other R.D.R. nodes, the mechanism might be different. For example, person A might go into a room, take a pistol out of a box, load it with live ammunition, put it back in the box, and then leave the room for ten minutes. During that time, person B is supposed to enter the room and replace the live ammunition with a dummy clip having the same weight. Then person A comes back into the room, puts the gun to his head, and pulls the trigger."

"But person A has no way of knowing whether person B has done his job?"

"Exactly."

"What is the role of the third person?"

"A proctor. An official of the R.D.R. who sees to it that the two partic.i.p.ants don't try to communicate."

"How frequently must they undergo this ritual?"

"As frequently as their name comes up at random, perhaps once every couple of years," Hackworth said. "It's a way of creating mutual dependency. These people know they can trust each other. In a tribe such as the F.D.R., whose view of the universe contains no absolutes, this ritual creates an artificial absolute."

The woman finished her hot drink, shook hands with the proctor, then began to ascend a polymer ladder, fixed to the rock, that took her back toward her horse. Hackworth spurred Kidnapper into movement, following a path that ran parallel to the base of the cliff, and rode for half a kilometer or so until it was joined by another path angling down from above. A few minutes later, the woman approached, riding her horse, an old-fas.h.i.+oned biological model.

She was a healthy, open-faced, apple-cheeked woman, still invigorated by her leap into the unknown, and she greeted them from some distance away, without any of the reserve of neo-Victorians.

"How do you do," Hackworth said, removing his bowler.

The woman barely glanced at Fiona. She reined her horse to a gentle stop, eyes fixed on Hackworth's face. She was wearing a distracted look. "I know you," she said. "But I don't know your name."

"Hackworth, John Percival, at your service. This is my daughter Fiona."

"I'm sure I've never heard that name," the woman said.

"I'm sure I've never heard yours," Hackworth said cheerfully.

"Maggie," the woman said. "This is driving me crazy. Where have we met?"

"This may sound rather odd," Hackworth said gently, "but if you and I could both remember all of our dreams-which we can't, of course-and if we compared notes long enough, we would probably find that we had shared a few over the years."

"A lot of people have similar dreams," Maggie said.

"Excuse me, but that's not what I mean," Hackworth said. "I refer to a situation in which each of us would retain his or her own personal point of view. I would see you. You would see me. We might then share certain experiences together-each of us seeing it from our own perspective."

"Like a ractive?"

"Yes," Hackworth said, "but you don't have to pay for it. Not with money, anyway."

The local climate lent itself to hot drinks. Maggie did not even take off her jacket before going into her kitchen and putting a kettle on to boil. The place was a log cabin, airier than it looked from the outside, and Maggie apparently shared it with several other people who were not there at the moment. Fiona, walking to and from the bathroom, was fascinated to see evidence of men and women living and sleeping and bathing together.

As they sat around having their tea, Hackworth persuaded Maggie to poke her finger into a thimble-size device. When he took this object from his pocket, Fiona was struck by a powerful sense of deja vu. She had seen it before, and it was significant. She knew that her father had designed it; it bore all the earmarks of his style.

Then they all sat around making small talk for a few minutes; Fiona had many questions about the workings of the R.D.R., which Maggie, a true believer, was pleased to answer. Hackworth had spread a sheet of blank paper out on the table, and as the minutes went by, words and pictures began to appear on it and to scroll up the page after it had filled itself up. The thimble, he explained, had placed some reconnaissance mites into Maggie's bloodstream, which had been gathering information, flying out through her pores when their tape drives were full, and offloading the data into the paper.

"It seems that you and I have a mutual acquaintance, Maggie," he said after a few minutes. "We are carrying many of the same tuples in our bloodstreams. They can only be spread through certain forms of contact."

"You mean, like, exchange of bodily fluids?" Maggie said blankly.

Fiona thought briefly of old-fas.h.i.+oned transfusions and probably would not have worked out the real meaning of this phrase had her father not flushed and glanced at her momentarily.

"I believe we understand each other, yes," Hackworth said.

Maggie thought about it for a moment and seemed to get irked, or as irked as someone with her generous and contented nature was ever likely to get. She addressed Hackworth but watched Fiona as she tried to construct her next sentence. "Despite what you Atlantans might think of us, I don't sleep ... I mean, I don't have s ... I don't have that many partners."

"I am sorry to have given you the mistaken impression that I had formed any untoward preconceptions about your moral standards," Hackworth said. "Please be a.s.sured that I do not regard myself as being in any position to judge others in this regard. However, if you could be so forthcoming as to tell me who, or with whom, in the last year or so ..."

"Just one," Maggie said. "It's been a slow year." Then she set her tea mug down on the table (Fiona had been startled by the unavailability of saucers) and leaned back in her chair, looking at Hackworth alertly. "Funny that I'm telling you this stuff-you, a stranger."

"Please allow me to recommend that you trust your instincts and treat me not as a stranger."

"I had a fling. Months and months ago. That's been it."

"Where?"

"London." A trace of a smile came onto Maggie's face. "You'd think living here, I'd go someplace warm and sunny. But I went to London. I guess there's a little Victorian in all of us.

"It was a guy," Maggie went on. "I had gone to London with a couple of girlfriends of mine. One of them was another R.D.R. citizen and the other, Trish, left the R.D.R. about three years ago and co-founded a local CryptNet node. They've got a little point of presence down in Seattle, near the market."

"Please pardon me for interrupting," Fiona said, "but would you be so kind as to explain the nature of CryptNet? One of my old school friends seems to have joined it."

"A synthetic phyle. Elusive in the extreme," Hackworth said.

"Each node is independent and self-governing," Maggie said. "You could found a node tomorrow if you wanted. Nodes are defined by contracts. You sign a contract in which you agree to provide certain services when called upon to do so."

"What sorts of services?"

"Typically, data is delivered into your system. You process the data and pa.s.s it on to other nodes. It seemed like a natural to Trish because she was a coder, like me and my housemates and most other people around here."

"Nodes have computers then?"

"The people themselves have computers, typically embedded systems," Maggie said, unconsciously rubbing the mastoid bone behind her ear.

"Is the node synonymous with the person, then?"

"In many cases," Maggie said, "but sometimes it's several persons with embedded systems that are contained within the same trust boundary."

"May I ask what level your friend Trish's node has attained?" Hackworth said.

Maggie looked uncertain. "Eight or nine, maybe. Anyway, we went to London. While we were there, we decided to take in some shows. I wanted to see the big productions. Those were nice-we saw a nice Doctor Faustus Doctor Faustus at the Olivier." at the Olivier."

"Marlowe's?"

"Yes. But Trish had a knack for finding all of these little, scruffy, out-of-the-way theatres that I never would have found in a million years-they weren't marked, and they didn't really advertise, as far as I could tell. We saw some radical stuff-really radical."

"I don't imagine you are using that adjective in a political sense," Hackworth said.

"No, I mean how they were staged. In one of them, we walked into this bombed-out old building in Whitechapel, full of people milling around, and all this weird stuff started happening, and after a while I realized that some of the people were actors and some were audience and that all of us were both, in a way. It was cool-I suppose you can get stuff like that on the net anytime, in a ractive, but it was so much better to be there with real, warm bodies around. I felt happy. Anyway, this guy was going to the bar for a pint, and he offered to get me one. We started talking. One thing led to another. He was really intelligent, really s.e.xy. An African guy who knew a lot about the theatre. This place had back rooms. Some of them had beds."

"After you were finished," Hackworth said, "did you experience any unusual sensations?"

Maggie threw back her head and laughed, thinking that this was a bit of wry humor on Hackworth's part. But he was serious.

"After we were finished?" she said. we were finished?" she said.

"Yes. Let us say, several minutes afterward."

Suddenly Maggie became disconcerted. "Yeah, actually," she said. "I got hot. Really hot. We had to leave, 'cause I thought I had a flu or something. We went back to the hotel, and I took my clothes off and stood out on the balcony. My temperature was a hundred and four. But the next morning I felt fine. And I've felt fine ever since."

"Thank you, Maggie," Hackworth said, rising to his feet and pocketing the sheet of paper. Fiona rose too, following her father's cue. "Prior to your London visit, had your social life been an active one?"

Maggie got a little pinker. "Relatively active for a few years, yes."

"What sort of crowd? CryptNet types? People who spent a lot of time near the water?"

Maggie shook her head. "The water? I don't understand."

"Ask yourself why you have been so inactive, Maggie, since your liaison with Mr.-"

"Beck. Mr. Beck."

"With Mr. Beck. Could it be that you found the experience just a bit alarming? Exchange of bodily fluids followed by a violent rise in core temperature?"

Maggie was poker-faced.

"I recommend that you look into the subject of spontaneous combustion," Hackworth said. And without further ceremony, he reclaimed his bowler and umbrella from the entryway and led Fiona back out into the forest.

Hackworth said, "Maggie did not tell you everything about CryptNet. To begin with, it is believed to have numerous unsavoury connexions and is a perennial focus of Protocol Enforcement's investigations. And"-Hackworth laughed ruefully-"it is patently untrue that ten is the highest level."

"What is the goal of this organisation?" Fiona asked.

"It represents itself as a simple, moderately successful data-processing collective. But its actual goals can only be known by those privileged to be included within the trust boundary of the thirty-third level," Hackworth said, his voice slowing down as he tried to remember why he knew all of these things. "It is rumoured that, within that select circle, any member can kill any other simply by thinking of the deed."

Fiona leaned forward and wrapped her arms snugly around her father's body, nestled her head between his shoulder blades, and held tight. She thought that the subject of CryptNet was closed; but a quarter of an hour later, as Kidnapper carried them swiftly through the trees down toward Seattle, her father spoke again, picking up the sentence where he had left it, as if he had merely paused for breath. His voice was slow and distant and almost trancelike, the memories percolating outward from deep storage with little partic.i.p.ation from his conscious mind. "CryptNet's true desire is the Seed-a technology that, in their diabolical scheme, will one day supplant the Feed, upon which our society and many others are founded. Protocol, to us, has brought prosperity and peace-to CryptNet, however, it is a contemptible system of oppression. They believe that information has an almost mystical power of free flow and self-replication, as water seeks its own level or sparks fly upward-and lacking any moral code, they confuse inevitability with Right. It is their view that one day, instead of Feeds terminating in matter compilers, we will have Seeds that, sown on the earth, will sprout up into houses, hamburgers, s.p.a.ces.h.i.+ps, and books-that the Seed will develop inevitably from the Feed, and that upon it will be founded a more highly evolved society."

He stopped for a moment, took a deep breath, and seemed to stir awake; when he spoke again, it was in a clearer and stronger voice. "Of course, it can't be allowed-the Feed is not a system of control and oppression, as CryptNet would maintain. It is the only way order can be maintained in modern society-if everyone possessed a Seed, anyone could produce weapons whose destructive power rivalled that of Elizabethan nuclear weapons. This is why Protocol Enforcement takes such a dim view of CryptNet's activities."

The trees parted to reveal a long blue lake below them. Kidnapper found its way to a road, and Hackworth spurred it on to a hand-gallop. Within a few hours, father and daughter were settling into bunkbeds in a second-cla.s.s cabin of the airs.h.i.+p Falkland Islands, Falkland Islands, bound for London. bound for London.

From the Primer, Princess Nell's activities as d.u.c.h.ess of Turing; the Castle of the Water-gates; other castles; the Cipherers' Market; Nell prepares for her final journey.

Princess Nell remained in Castle Turing for several months. During her quest for the twelve keys, she had entered many castles, outwitted their sentries, picked their locks, and rifled their treasuries; but Castle Turing was an altogether different place, a place that ran on rules and programs that were devised by men and that could be rewritten by one who was adept in the language of the ones and zeroes. She need not content herself with sneaking in, seizing a trinket, and fleeing. Castle Turing she made her own. Its demesne became Princess Nell's kingdom.

First she gave the Duke of Turing a decent burial. Then she studied his books until she had mastered them. She acquainted herself with the states by which the soldiers, and the mechanical Duke, could be programmed. She entered a new master program into the Duke and then restarted the turning of the mighty Shaft that powered the castle. Her first efforts were unsuccessful, as her program contained many errors. The original Duke himself had not been above this; he called them bugs, in reference to a large beetle that had become entangled in one of his chains during an early experiment and brought the first Turing machine to a violent halt. But with steadfast patience, Princess Nell resolved these bugs and made the mechanical Duke into her devoted servant. The Duke in turn had the knack of putting simple programs into all of the soldiers, so that an order given him by Nell was rapidly disseminated into the entire force.

For the first time in her life, the Princess had an army and servants. But it was not a conquering sort of army, because the springs in the soldiers' backs unwound rapidly, and they did not have the adaptability of human soldiers. Still, it was an effective force behind the walls of the castle and made her secure from any conceivable aggressor. Following maintenance schedules that had been laid down by the original Duke, Princess Nell set the soldiers to work greasing the gears, repairing cracked shafts and worn bearings, and building new soldiers out of stockpiled parts.

She was heartened by her success. But Castle Turing was only one of seven ducal seats in this kingdom, and she knew she had much work to do.

The territory around the castle was deeply forested, but gra.s.sy ridges rose several miles away, and standing on the castle walls with the original Duke's spygla.s.s, Nell was able to see wild horses grazing there. Purple had taught her the secrets of mastering wild horses, and Duck had taught her how to win their affection, and so Nell mounted an expedition to these gra.s.slands and returned a week later with two beautiful mustangs, Coffee and Cream. She equipped them with fine tack from the Duke's stables, marked with the T crest-for the crest was hers now, and she could with justification call herself the d.u.c.h.ess of Turing. She also brought a plain, unmarked saddle so that she could pa.s.s for a commoner if need be-though Princess Nell had become so beautiful over the years and had developed such a fine bearing that few people would mistake her for a commoner now, even if she were dressed in rags and walking barefoot.

Lying in her bunkbed in Madame Ping's dormitory, reading these words from a softly glowing page in the middle of the night, Nell wondered at that. Princesses were not genetically different from commoners.

On the other side of a fairly thin wall she could hear water running in half a dozen sinks as young women performed their crepuscular ablutions. Nell was the only scripter staying in Madame Ping's dormitory; the others were performers and were just coming back from a long vigorous s.h.i.+ft, rubbing liniment on their shoulders, sore from wielding paddles against clients' bottoms, or snorting up great nostril-loads of mites programmed to seek out their inflamed b.u.t.tocks and help to repair damaged capillaries overnight. And of course, many more traditional activities were going on, such as douching, makeup removal, moisturizing, and the like. The girls went through these motions briskly, with the unselfconscious efficiency that the Chinese all seemed to share, discussing the day's events in the dry Shanghainese dialect. Nell had been living among these girls for a month and was just starting to pick up a few words. They all spoke English anyway.

She stayed up late reading the Primer in the dark. The dormitory was a good place for this; Madame Ping's girls were professionals, and after a few minutes of whispering, giggling, and scandalized communal shus.h.i.+ng, they always went to sleep.

Nell sensed that she was coming close to the end of the Primer.