He retrieved her parasol for her and, recollecting historical dramas he had seen, offered her his arm. They walked slowly between the flowerbeds. Wind lulled, a bird whistled, sunlight baked odors out of the roses.
"Where are we?" he asked.
"And when?" she replied. "In England of the mid-eighteenth century, on an estate in Surrey." He nodded. He had in fact read rather widely. She fell silent, thinking, before she went on: "Gaia and Wayfarer decided a serene enclave like this would be the best rendezvous for us."
"Really? I'm afraid I'm as out of place as a toad on a keyboard."
She smiled, then continued seriously; "I told you I've been given familiarity with the milieu. We'll be visiting alien ones-whatever ones you choose, after I've explained what else I know about what she has been doing these many years. That isn't much. I haven't seen any other worlds of hers. You will take the leadership."
"You mean because I'm used to odd environments and rough people? Not necessarily. I dealt with nature, you know, on Earth and in space. Peaceful."
"Dangerous."
"Maybe. But never malign."
"Tell me," she invited.
They entered the house and seated themselves in its parlor. Casement windows stood open to green parkscape where deer grazed; afar were a thatched farm cottage, its outbuildings, and the edge of grainfields. Cleanly shaped furniture stood among paintings, etchings, books, two portrait busts. A maidservant rustled in with a tray of tea and cakes. She was obviously shocked by the newcomer but struggled to conceal it. When she had left, Laurinda explained to Christian that the owners of this place, Londoners to whom it was a summer retreat, had lent it to their friend, the eccentric Miss Ashcroft, for a holiday.
So had circumstances and memories been adjusted. It was an instance of Gaia directly interfering with the circumstances and events in an emulation. Christian wondered how frequently she did.
"Eccentricity is almost expected in the upper classes," Laurinda said. "But when you lived you could simply be yourself, couldn't you?"
In the hour that followed, she drew him out. His birth home was the Yukon Ethnate in the Bering Federation, and to it he often returned while he lived, for its wilderness preserves, mountain solitudes, and uncrowded, uncowed, plain-spoken folk. Otherwise the nation was prosperous and progressive, with more connections to Asia and the Pacific than to the decayed successor states east and south. Across the Pole, it was also becoming intimate with the renascent societies of Europe, and there Christian received part of his education and spent considerable of his free time.
His was an era of savage contrasts, in which the Commonwealth of Nations maintained a precarious peace. During a youthful, impulsively taken hitch in the Conflict Mediation Service, he twice saw combat. Later in his life, stability gradually became the norm. That was largely due to the growing influence of the artificial intelligence network. Most of its consciousness-level units interlinked in protean fashion to form minds appropriate for any particular situation, and already the capabilities of those minds exceeded the human. However, there was little sense of rivalry. Rather, there was partnership. The new minds were willing to advise, but were not interested in dominance.
Christian, child of forests and seas and uplands, heir to ancient civilizations, raised among their ongoing achievements, returned on his vacations to Earth in homecoming. Here were his kin, his friends, woods to roam, boats to sail, girls to kiss, songs to sing and glasses to raise (and a gravesite to visit. He barely mentioned his wife to Laurinda. She died before uploading technology was available). Always, though, he went back to space. It had called him since first he saw the stars from a cradle under the cedars. He became an engineer. Besides fellow humans he worked closely with sapient machines, and some of them got to be friends too, of an eerie kind. Over the decades, he took a foremost role in such undertakings as the domed Copernican Sea, the Asteroid Habitat, the orbiting antimatter plant, and finally the Grand Solar Laser for launching interstellar vessels on their way. Soon afterward, his body died, old and full of days; but the days of his mind had barely begun.
"A fabulous life," Laurinda said low. She gazed out over the land, across which shadows were lengthening. "I wonder if ... they . . . might not have done better to give us a cabin in your wilderness."
"No, no," he said. "This is fresh and marvelous to me."
"We can easily go elsewhere, you know. Any place, any time that Gaia has generated, including ones that history never saw. I'll fetch our amulets whenever you wish."
He raised his brows. "Amulets?"
"You haven't been told-informed? They are devices. You wear yours and give it the command to transfer you."
He nodded. "I see. It maps an emulated person into different surroundings."
"With suitable modifications as required. Actually, in many cases it causes a milieu to be activated for you. Most have been in standby mode for a long time. I daresay Gaia could have arranged for us to wish ourselves to wherever we were going and call up whatever we needed likewise. But an external device is better."
He pondered. "Yes, I think I see why. If we got supernatural powers, we wouldn't really be human, would we? And the whole idea is that we should be." He leaned forward on his chair. "It's your turn. Tell me about yourself."
"Oh, there's too much. Not about me, I never did anything spectacular like you, but about the times I lived in, everything that happened to change this planet after you left it . . . ."
She was born here, in England. By then a thinly populated province of Europe, it was a quiet land ("half a-dream," she said) devoted to its memorials of the past. Not that creativity was dead; but the arts were rather sharply divided between ringing changes on classic works and efforts to deal with the revelations coming in from the stars. The esthetic that artificial intelligence was evolving for itself overshadowed both these schools. Nevertheless Laurinda was active in them.
Furthermore, in the course of her work she ranged widely over Earth. (By then, meaningful work for humans was a privilege that the talented and energetic strove to earn.) She was a liaison between the two kinds of beings. It meant getting to know people in their various societies and helping them make their desires count. For instance, a proposed earthquake control station would alter a landscape and disrupt a community; could it be resited, or if not, what cultural adjustments could be made? Most commonly, though, she counseled and aided individuals bewildered and spiritually lost.
Still more than him, she was carefully vague about her private life, but he got the impression that it was generally happy. If childlessness was an unvoiced sorrow, it was one she shared with many in a population-regulated world; he had had only a son. She loved Earth, its glories and memories, and every fine creation of her race. At the end of her mortality she chose to abide on the planet, in the wholeness that was to become Gaia.
He thought he saw why she had been picked for resurrection, to be his companion, out of all the uncounted millions who had elected the same destiny.
Aloud, he said, "Yes, this house is right for you. And me, in spite of everything. We're both of us more at home here than either of us could be in the other's native period. Peace and beauty."
"It isn't a paradise," she answered gravely. "This is the real eighteenth century, remember, as well as Gaia could reconstruct the history that led to it," always monitoring, making changes as events turned incompatible with what was in the chronicles and the archeology. "The household staff are underpaid, undernourished, underrespected-servile. The American colonists keep slaves and are going to rebel. Across the Channel, a rotted monarchy bleeds France white, and this will bring on a truly terrible revolution, followed by a quarter century of war."
He shrugged. "Well, the human condition never did include sanity, did it?" That was for the machines.
"In a few of our kind, it did," she said. "At least, they came close. Gaia thinks you should meet some, so you'll realize she isn't just playing cruel games. I have"-in the memories with which
she had come into this being-"invited three for dinner tomorrow. It tampers a trifle with their actual biographies, but Gaia can remedy that later if she chooses." Laurinda smiled. "We'll have to make an amulet provide you with proper smallclothes and wig."
"And you provide me with a massive briefing, I'm sure. Who are they?"
"James Cook, Henry Fielding, and Erasmus Darwin. I think it will be a lively evening."
The navigator, the writer, the polymath, three tiny, brilliant facets of the heritage that Gaia guarded.
VI
Now Wayfarer downloaded another secondary personality and prepared it to go survey Earth.
He, his primary self, would stay on the mountain, in a linkage with Gaia more close and complete than was possible over interstellar distances. She had promised to conduct him through her entire database of observations made across the entire planet during manifold millions of years. Even for those two, the undertaking was colossal. At the speed of their thought, it would take weeks of external time and nearly total concentration. Only a fraction of their awarenesses would remain available for anything else-a fraction smaller in him than in her, because her intellect was so much greater.
She told him of her hope that by this sharing, this virtually direct exposure to all she had perceived, he would come to appreciate why Earth should be left to its fiery doom. More was involved than scientific knowledge attainable in no other way. The events themselves would deepen and enlighten the galactic brain, as a great drama or symphony once did for humans. But Wayfarer must undergo their gigantic sweep through the past before he could feel the truth of what she said about the future.
He had his doubts. He wondered if her human components, more than had gone into any other node, might not have given her emotions, intensified by ages of brooding, that skewed her rationality. However, he consented to her proposal. It accorded with his purpose in coming here.
While he was thus engaged, Christian would be exploring her worlds of history and of might-have-been and a different agent would range around the physical, present-day globe.
In the latter case, his most obvious procedure was to discharge an appropriate set of the molecular assemblers he had brought along and let them multiply. When their numbers were sufficient, they would build (grow; brew) a fleet of miniature robotic vessels, which would fly about and transmit to him, for study at his leisure, everything their sensors detected.
Gaia persuaded him otherwise: "If you go in person, with a minor aspect of me for a guide, you will get to know the planet more quickly and thoroughly. Much about it is unparalleled. It may help you see why I want the evolution to continue unmolested to its natural conclusion."
He accepted. After all, a major part of his mission was to fathom her thinking. Then perhaps Alpha and the rest could hold a true dialogue with her and reach an agreement-whatever it was going to be. Besides, he could deploy his investigators later if this expedition left him dissatisfied.
He did inquire: "What are the hazards?"
"Chiefly weather," she admitted. "With conditions growing more extreme, tremendous storms spring up practically without warning. Rapid erosion can change contours almost overnight, bringing landslides, flash floods, sudden emergence of tidal bores. I do not attempt to monitor in close detail. That volume of data would be more than I could handle"-yes, she-"when my main concern is the biological phenomena."
His mind reviewed her most recent accounts to the stars. They were grim. The posthuman lushness of nature was megayears gone. Under its clouds, Earth roasted. The loftiest mountaintops were bleak, as here above the Rainbowl, but nothing of ice or snow remained except dim geological traces. Apart from the waters and a few islands where small, primitive species hung on, the tropics were sterile deserts. Dust and sand borne on furnace winds scoured their rockscapes. North and south they encroached, withering the steppes, parching the valleys, crawling up into the hills. Here and there survived a jungle or a swamp, lashed by torrential rains or wrapped hot and sullen in fog, but it would not be for much longer. Only in the high latitudes did a measure of benignity endure. Arctica's climates ranged from Floridian-Christian Brannock's recollections-to cold on the interior heights. South of it across a sea lay a broad continent whose northerly parts had temperatures reminiscent of central Africa. Those were the last regions where life kept any abundance.
"Would you really not care to see a restoration?" Wayfarer had asked her directly, early on.
"Old Earth lives in my database and emulations," Gaia had responded. "I could not map this that is happening into those systems and let it play itself out, because I do not comprehend it well enough, nor can any finite mind. To divert the course of events would be to lose, forever, knowledge that I feel will prove to be of fundamental importance."
Wayfarer had refrained from pointing out that life, reconquering a world once more hospitable to it, would not follow predictable paths either. He knew she would retort that experiments of that kind were being conducted on a number of formerly barren spheres, seeded with synthesized organisms. It had seemed strange to him that she appeared to lack any sentiment about the mother of humankind. Her being included the beings of many and many a one who had known sunrise dew beneath a bare foot, murmurs in forest shades, wind-waves in wheatfields from horizon to horizon, yes, and the lights and clangor of great cities. It was, at root, affection, more than any scientific or technological challenge, that had roused in Gaia's fellows among the stars the wish to make Earth young again.
Now she meant to show him why she felt that death should have its way.
Before entering rapport with her, he made ready for his expedition. Gaia offered him an aircraft; swift, versatile, able to land on a square meter while disturbing scarcely a leaf. He supplied a passenger for it.
He had brought along several bodies of different types. The one he picked would have to operate independently of him, with a separate intelligence. Gaia could spare a minim of her attention to have telecommand of the flyer; he could spare none for his representative, if he was to range through the history of the globe with her.
The machine he picked was not equivalent to him. Its structure could never have supported a matrix big enough to operate at his level of mentality. Think of it, metaphorically, as possessing a brain equal to that of a high-order human. Into this brain had been copied as much of Wayfarer's self-pattern as it could hold-the merest sketch, a general idea of the situation, incomplete and distorted like this myth of ours. However, it had reserves it could call upon. Inevitably, because of being the most suitable, the Christian Brannock aspect dominated.
So you may, if you like, think of the man as being reborn in a body of metal, silicates, carbon and other compounds, electricity and other forces, photon and particle exchanges, quantum currents. It was not quite the same as his earlier postmortal robotic existence. There was more richness, even more passion, though his passions were not identical with those of flesh. In most respects, he differed more from the long-dead mortal than did the re-creation in Gaia's emulated worlds. If we call the latter Christian, we can refer to the former as Brannock.
His frame was of approximately human size and shape. Matte blue-gray, it had four arms. He could reshape the hands of the lower pair as desired, to be a tool kit. He could similarly adapt his feet according to the demands upon them, and could extrude a spindly third leg for support or extra grip. His back swelled outward to hold a nuclear energy source and various organs. His head was a domed cylinder. The sensors in it and throughout the rest of him were not conspicuous but gave him full-surround information. The face was a holographic screen in which he could generate whatever image he wished. Likewise could he produce every frequency of sound, plus visible light, infrared, and microwave radio, for sensing or for short-range communication. A memory unit, out of which he could quickly summon any data, was equivalent to a large ancient library.
He could not process those data, comprehend and reason about them, at higher speed than a human genius. He
had other limitations as well. But then, he was never intended to function independently of equipment.
He was soon ready to depart. Imagine him saying to Wayfarer, with a phantom grin, "Adios. Wish me luck."
The response was . . . absent-minded. Wayfarer was beginning to engage with Gaia.
Thus Brannock boarded the aircraft in a kind of silence. To the eye it rested small, lanceolate, iridescently aquiver. The material component was a tissue of wisps. Most of that slight mass was devoted to generating forces and maintaining capabilities, which Gaia had not listed for him. Yet it would take a wind of uncommon violence to endanger this machine, and most likely it could outrun the menace.
He settled down inside. Wayfarer had insisted on manual controls, against emergencies that he conceded were improbable, and Gaia's effectors had made the modifications. An insubstantial configuration shimmered before Brannock, instruments to read, key-points to touch or think at. He leaned back into a containing field and let her pilot. Noiselessly, the flyer ascended, then came down through the cloud deck and made a leisurely way at five hundred meters above the foothills.
"Follow the Remnant River to the sea," Brannock requested. "The view inbound was beautiful."
"As you like," said Gaia. They employed Sonics, his voice masculine, hers-perhaps because she supposed he preferred it-feminine in a low register. Their conversation did not actually go as reported here. She changed course and he beheld the stream shining amidst the deep greens of the Bountiful Valley, under a silver gray heaven. "The plan, you know, is that we shall cruise about Arctica first. I have an itinerary that should provide you a representative sampling of its biology. At our stops, you can investigate as intensively as you care to, and if you want to stop anyplace else we-can do that too."
"Thank you," he said. "The idea is to furnish me a kind of baseline, right?"
"Yes, because conditions here are the easiest for life. When you are ready, we will proceed south, across lands increasingly harsh. You will learn about the adaptations life has made. Many are extraordinarily interesting. The galactic brain itself cannot match the creativity of nature."
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