"Most of 'em never leave the City walls at all. And those that do - because they have to, like your ceiling-farmer friend - take their cars."

"Is that a good thing, do you think?"

Bzya shrugged. He was wearing a scuffed, ill-fitting coverall, and under its coa.r.s.e fabric his shoulder muscles bunched like independent animals. "Neither one nor the other. It's just the way things are. And always have been."

"Not always," Adda murmured. He gazed around the sky with his good eye and sniffed, trying to a.s.sess the spin weather. "And maybe not forever. The City isn't immune to the changes wrought by these unnatural Glitches. Even your great leader Hork admits that."

Bzya nodded at the boys. "It's good to see Farr looking a bit happier."

"Yes." Adda smiled. "The body has its wisdom. When you're doing barrel-rolls in the Air, it's hard to remember your problems."

Bzya patted his ample gut. "I wish I could remember doing barrel-rolls even. Still, I know what you mean." Now Cris had set up his board. Farr rested it against the soft, even resistance of the Magfield and Cris set his feet on it, flexing his legs experimentally. Adda saw the boy's muscles bunch as he pressed against the Magfield; his arms were outstretched and his fingers seemed to tickle at the Air, as if a.s.sessing the strength and direction of the Magfield. Farr pushed him off, recoiling through a mansheight or so, and Cris rocked the board steadily. He slid through the Air with impressive speed and grace; boy and board looked like a single ent.i.ty, inseparable.

Cris performed slow, elegant turns in the Air; then - with a thrust at the board and a swivel of his feet almost too fast for Adda's rheumy eye to follow - he swept up and over, looping the loop in a single, tight motion. The boy flew across the blind face of Parz City, electron gas sparkling blue about his gleaming board.

He came to rest close to Bzya and Adda, and stepped away from his board gracefully. Farr Waved over to join them. Still a little dazzled by Cris's prowess, Adda saw the contrast with Farr: the Human Being had innate, Pole-enhanced strength, but beside Cris's athletic grace he looked clumsy, ma.s.sive and uncoordinated.

But then, Farr hadn't had the luxury of a lifetime playing games in the Air.

"You ride that thing well."

"Thanks." Cris dipped his head with its oddly dyed hair; he seemed acceptably unself-conscious about his skill. "And you're in the Games, I hear," Bzya said.

Adda frowned. "What Games?"

"They come once a year," Farr said eagerly. "Cris has told me about them. Sports in the Air - Surfing, the Luge, acrobats, Wave-boxing. Half the people in the City go out to the Stadium to watch."

"Sounds fun."

Bzya poked Adda in the ribs with a sharp thumb. "It is fun, you old fogey. You should go along if you're still here."

"It's more than fun." Cris's tone was deeper than normal, earnest; Adda studied him curiously. Cris was a good boy, he had decided - shallow, but a decent friend to Farr. But now he sounded different: he was intense, his eyecups deep and dark.

Bzya said to Adda, "The Games can make a big difference, for a talented young man like Cris. A moment of fame - money - invitations to the Palace..."

"This is the third year I've had an application in for the Surfing," Cris said. "I've been in the top five in my age group all that time. But this is the first time they've let me in." He looked sour. "Even so, I'm unseeded. I've got a lousy draw, and..."

Adda was aware of Farr hovering awkwardly close to them, his callused hands heavy at his sides. The contrast with Cris was painful. "Well," he said, trying not to sound hostile to the City boy's prattle, "you should get your practice done, then."

The boys peeled away once more. Cris mounted his board and was soon sweeping through the Air again, an insect sizzling with electron gas before the face of Parz; Farr Waved in his wake, calling out excitedly.

"Don't be hard on the boy," Bzya murmured. "He's a City lad. You can't expect him to have much sense of perspective."

"The Games mean nothing to me."

Bzya swiveled his scarred face to Adda. "But they mean everything to Cris. To him, it's a chance - maybe his only chance - of breaking out of the life that's been set out for him. You'd have to have a heart of Corestuff, man, not to sympathize with the boy for trying to change his lot."

"And what then, Fisherman? After his few moments of glory - after the grand folk have finished using him as their latest toy. What will become of him then?"

"If he's smart enough, and good enough, it won't end. He can parlay his gifts into a niche in the Upside, before he gets too old to shine on the Surfboard. And even if not - h.e.l.l, it's a holiday for him, upfluxer. A holiday from the drudgery that will make up most of his life."

There was a shout from above them. Cris had ridden his board high up the City's face, and was now sweeping through the sparkling Air close to the Longitude band. Electron gas swirled around his board and body, crackling and sparking blue. Other young people - evidently friends of Cris - had joined them, appearing from cracks in the Skin as if from nowhere - or so it seemed to Adda - and they raced around the Longitude band like young rays.

"They shouldn't do that," Bzya murmured. "Against the law, strictly speaking. If Cris goes too close to the Longitude the flux gradients could tear him apart."

Then why's he doing it?"

"To learn to master the flux," the Fisherman said. "To learn how to conquer the fiercer gradients he'll find when he's in the Games, and he Surfs across the face of the Pole."

Adda sniffed. "So now I know how you choose your rulers - on whether they can balance on a bit of wood. No wonder this City's such a d.a.m.n mess."

Bzya's laughter echoed from the blank, crudely finished wall of the City. "You don't like us much, do you, Adda?"

"Not much." He looked at Bzya, hesitating. "And I don't understand how you've kept your sense of humor, my friend."

"By accepting life as it is. I can question, but I can't change. Anyway, Parz isn't some kind of huge prison, as you seem to imagine. It's home for a lot of people - it's like a machine, designed to improve the lives of young people like Cris."

"Then the machine's not b.l.o.o.d.y working."

Bzya said calmly, "Would you exchange Farr's life and experiences, to date, for Cris's?"

"But Cris's thinking is so narrow. The Games, his parents... as if this City was all the world, safe and eternal. Instead of..." He searched for the words. "Instead of a box, lashed up from old lumber, floating around in immensity..."

Bzya touched his shoulder. "But that's why you and I are here, old man. To keep the world away from boys like Farr and Cris - to give them a place that seems as stable and eternal as your parents did when you were a child - until they are old enough to cope with the truth." He turned his scarred face to the North, staring into the diverging vortex lines with a trace of anxiety. "I wonder how much longer we're going to be able to achieve that."

Again and again, Cris Mixxax looped around the huge Corestuff band.

It was the day of the launch. The down-gaping mouth of the Harbor, here in the deepest Downside of the City, framed clear, yellow Air. A few people Waved beneath the entrance and peered up into the dark. Engineers talked desultorily as they waited for Hork to arrive, and to begin the launch proper. There was a smell of old, splintering wood.

Dura clung to a rail close to the lip of the access port, keeping to herself. She had already said her good-byes. Toba had cooked them a fine meal in his little Midside home, but it had been a difficult occasion; Dura had had to work hard to break through Farr's resentful reserve. She'd asked Adda, quietly, to keep Farr away from the launch site today. She'd have enough to think about without the emotional freight of another round of farewells.

Even, she thought, wrapping her arms around her torso, if they turned out to be final farewells.

She looked down at the craft, studying lines which had become familiar to her in weeks of designing, building and testing. Hork V had decided to call his extraordinary craft the "Flying Pig." It was a clumsy, ugly name, Dura thought; but it caught the essence, maybe, of a clumsy, ugly vessel. The ship as finally constructed - after two failed prototypes - was a squat cylinder two mansheights across and perhaps three tall. The hull, of polished wood, was punctured by large, staring windows of clearwood. There were also clearwood panels set into the upper and lower cross-sections of the cylinder. The whole craft was bound about by five hoops of st.u.r.dy Core-matter. The Air-pigs whose farts would power the vessel could be seen through the windows, lumps of straining, harnessed energy. The ship was suspended by thick cables from huge, splintered pulleys which - on normal days - bore Bells down toward the Quantum Sea.

This, then, was the craft which would carry two people into the lethal depths of the underMantle. In the dingy, dense Air of the City's Harbor the thing looked st.u.r.dy enough, Dura supposed, but she doubted she'd feel so secure once they were underway.

There was a disturbance above her, a sound of hatches banging. Hork V, Chair of Parz City, resplendent in a glittering coverall, descended from the gloom above. He seemed to glow; his bearded face was split by a huge smile. Dura saw that Physician Muub and the engineer Seciv Trop followed him. "Good day, good day," Hork called to Dura, and he clapped her meatily on the shoulder-blade. "Ready for the off?"

Dura, her head full of her regrets and fears, turned away without speaking.

Seciv Trop wafted down, coming to rest close to her. He touched her arm, gently; the many pockets of his coverall were crammed, as usual, with unidentifiable - and probably irrelevant - items. "Travel safely," he said.

She turned, at first irritated; but there was genuine sympathy in his finely drawn face. "Thanks," she said slowly.

He nodded. "I understand how you're feeling. Does that surprise you? - crusty old Seciv, good for nothing without his styli and tables. But I'm human, just the same. You're afraid of the journey ahead..."

"Terrified would be a better word."

He grimaced. "Then at least you're sane. You're already missing your family and friends. And you probably don't expect to make it back, ever."

She felt a small surge of grat.i.tude to Seciv; this was the first time anyone had actually voiced her most obvious fear. "No, frankly."

"But you're going anyway." He smiled. "You put the safety of the world ahead of your own."

"No," she snapped. "I put my brother's safety ahead of my own."

"That's more than sufficient."

As she had suspected, the City men had insisted on one of the Human Beings taking this trip. Adda was ruled out because of age and injury. Farr's omission - which came to his frustration - hadn't been a foregone conclusion; his youth, in the eyes of those making the decisions, had barely outweighed his experience as a novice Fisherman. Dura had been forced to argue hard.

The second crewman had been a surprise: it was to be Hork, Chair of Parz, himself. Now Hork was moving around the bay, glad-handing the engineers. Dura watched his progress sourly. He must be subject to the same fears as herself, and - in recent months anyway - to enormous personal pressure - and yet he looked relaxed, at ease, utterly in command; he had a natural authority which made her feel small, weak.

"He wears his fear well," she said sourly.

Seciv pulled at the corner of his mouth. "Perhaps. Or perhaps his fear of not taking the voyage, of remaining here, is the greater. He is gambling a great deal on this voyage, you know."

This stunt... Yes, Dura did know; she'd become immersed enough in the politics of Parz to be able - with the help of Ito and Toba - to understand something of Hork's situation. However unreasonable it might be, the citizens of Parz expected Hork to resolve their troubles - to lift food rationing, to restore the lumber convoys and get the place working again. To open the shops, shops, d.a.m.n it. That he'd manifestly failed to do so (but how could he have succeeded?) had put his position in doubt; there were factions in his Court and on the larger Committee who were gunning for him, with varying degrees of openness. d.a.m.n it. That he'd manifestly failed to do so (but how could he have succeeded?) had put his position in doubt; there were factions in his Court and on the larger Committee who were gunning for him, with varying degrees of openness.

This ludicrous jaunt into the underMantle was Hork's last gamble. All or nothing. If it succeeded then he, Hork, would return as the savior of the City and all the peoples of the Mantle. But if it failed - well, Dura thought uneasily, perhaps it would be better for Hork to die in a glorious instant, in the deep underMantle, than at the hands of an a.s.sa.s.sin here in the bright corridors of Parz.

The crew members had to climb into the ship through a hinged hatch set in the upper end of the cylinder. Hosch, the former Harbor supervisor, had been checking the craft's simple systems; now Dura watched his thin, hunched shoulders emerge from the craft through the crew hatch. As Muub had expected, Hosch had turned out to be a good manager of the construction project, despite his sour personality; he'd been able effectively to draw out the mercurial expertise of the likes of Seciv Trop and to marry it to the practical skills of his Harbor engineers.

Hosch glanced up, saw that both Dura and Hork were ready. "It's time," he said.

Dura felt something within her recede. As if in a dream she watched her own hands and legs working as she clambered down toward the ship.

She climbed stiffly through the hatch and into the interior, squeezing past the row of bound, straining Air-pigs and the sleek turbine beside them. She experienced a mixture of gratified relief at being underway, and a tang of sheer, awful terror.

With bellowed good-byes to the engineers, to Muub, Seciv and the rest, Hork shook Hosch's thin hand and clambered into the cabin, squeezing his sparkling bulk through the hatch. He seemed careless of the pollution of his gleaming suit by the dirt of the pigs. He dragged the hatch closed after him and dogged its wooden latches tight.

For a moment Hork and Dura hovered close to the hatch, alone in there for the first time. Their eyes met. Now, Now, Dura thought, Dura thought, now the two of them were bound to each other, for good or ill. now the two of them were bound to each other, for good or ill. She could see a slow, appraising awareness of that in Hork's expression. But there was little fear there; she read humor, enthusiasm. She could see a slow, appraising awareness of that in Hork's expression. But there was little fear there; she read humor, enthusiasm.

By the blood of the Xeelee, she thought. she thought. He's actually enjoying this. He's actually enjoying this.

Without speaking they descended into the craft.

The pigs were strapped in place close to the top of the cylinder. Dura climbed into her loose harness close to the pigs. The walls of the cabin were fat with Air-tanks, food stores, equipment lockers and a primitive latrine. Cooling fans hummed and wood-lamps, their green glow dim, studded the walls.

Toward the base of the ship Hork took his place at the craft's simple control panel, a board placed before one of the broader windows and equipped with three levers and a series of switches. He rolled his sleeves back from his arms with every evidence of relish.

There was a pounding on the hull.

Hork thumped back enthusiastically, grinning through his beard. "So," he said breathlessly, "so it begins!"

The craft jolted into motion. Dura heard a m.u.f.fled cheer from the engineers in the Harbor, the creaking of the pulleys as they began to pay out cable.

After a few seconds the craft emerged from the Harbor. The golden brilliance of Polar Air-light swept the interior of the ship, filling Dura with a nostalgic, claustrophobic ache. The silhouetted forms of Waving people - some of them children - accompanied the craft as it began its descent from the City.

Hork was laughing. Dura looked down at him, disbelieving.

"Oh, come on," Hork said briskly. "We're off! Isn't this a magnificent adventure? And what a relief it is to be doing doing something, to be going somewhere. Eh, Dura?" something, to be going somewhere. Eh, Dura?"

Dura sniffed, letting her face settle into sourness. "Well, Hork, here I am going to h.e.l.l in the belly of a wooden pig. It's a bit hard to find much to smile about. With respect. And we do have work to do."

Hork's expression was hard, and she felt briefly uneasy - she'd been around him long enough now to witness several of his towering rages. But he merely laughed aloud once more. His noisy, exuberant presence was overwhelming in the cramped cabin; Dura felt herself shrink from it, as if escaping into herself. Hork said, "Quite right, captain! And isn't it time you started working the pigs?"

He was right; Dura swiveled in her sling to begin the work. The craft wouldn't be cut loose of the Harbor cable for some time, but they needed to be sure the internal turbine and the magnetic fields were fully functioning. The animals' harness, slung across the width of the cabin, kept the pigs' rears aimed squarely at the wide blades of a turbine. A trough carved from unfinished wood had been fixed a micron or so before the pigs' sketchy, six-eyed faces, and now Dura took a sack of leaves from a locker and filled the trough with luscious vegetable material, crushing the stuff as she worked. Soon the delicious tang of the leaves filled the cabin. Dura was aware of Hork bending over his console, evidently shutting out the scents; as for herself - well, she could all but taste the protons dripping out onto her tongue.

The pigs could barely stand it. Their hexagonal arrays of eyecups bulged and their mouths gaped wide. With grunts of protest they hurled themselves against the unyielding harness toward the leaves, their jetfarts exploding in the cramped atmosphere of the cabin.

Under the steady pressure of the jetfart stream, the broad blades of the turbine began to turn. Soon the sweet, musky smell of pig-fart permeated the Air of the cabin, reminding Dura, if she closed her eyes, of the scents of her childhood, of the Net with its enclosed herd. She scattered a few fragments of food into the grasp of the pigs' gaping maws. Just enough to keep them fed, but little enough to keep them interested in more.

The anatomy of a healthy Air-pig was efficient enough to enable it to generate farts for many days on very little food. Pigs could travel meters allowing as much of their bulky substance to dissolve into fart energy as was required; these five, though terrified and frustrated by the conditions into which they had been penned, should have little problem powering the turbine for as long as the humans needed. And there was a back-up system - a stove powered by nuclear-burning wood - if they were desperate enough to need to risk its heat in the confines of the cabin.

Hork, grunting to himself, experimentally threw switches. The ship shuddered in response, and Hork peered out of the window, gauging the effect of the currents generated in the superconducting hoops.

Farr's face suddenly appeared outside the ship, at the window opposite Dura. His expression was solemn, empty. He was Waving hard, she realized; they must be descending rapidly already, and soon he and the other Wavers would not be able to keep up.

Farr must have given Adda the slip. And so, after all, here was a last good-bye. She forced herself to smile at Farr and raised her hand.

There was a thud from the hull of the "Flying Pig"; the little craft shuddered in the Air before settling again.

Dura frowned. "What was that?"

Hork looked up, his wide face bland. "The Harbor cable cutting loose. Right on schedule." He glanced out of the window at the dark shadows of the superconducting hoops. "We're falling under our own power now; the currents in the hoops are Waving us deeper into the Star. And the hoops are the only way we're going to get back home... We're alone," he said. "But we're on our way."

20.

THREE METERS DEEP.

It was a depth Dura couldn't comprehend. Humans were confined within the Mantle to a sh.e.l.l of superfluid Air only a few meters thick. Her first journey with Toba to the Pole from the upflux - so far that she had felt she was traveling around the curvature of the Star itself - had only been about thirty meters.

Now she was drilling whole meters into the unforgiving bulk of the Star itself. She imagined the Star crushing their tiny wooden boat and spitting them out, like a tiny infestation. And it was small comfort to remember that their journey would be broken before reaching such a depth only if they achieved their goal... if the unimaginable really did, after all, emerge from the Core to greet them.

By the end of the second day they were already well below the nebulous boundary of the habitable layer of Air. The yellow brightness of the Air outside the windows had faded - to amber, then a deeper orange, and finally to a blood-purple color reminiscent of the Quantum Sea. Dura pressed her face against cold clearwood, hoping to see something - anything: exotic animals, unknown, inhuman people, some kind of structure inside the Star. But there was only the muddy purple of the thickening Air, and her own distorted, indistinct reflection in the wood-lamps' green light. She was trapped in here - with her fears, and with Hork. She had expected to feel small, vulnerable inside this tiny wooden box as it burrowed its way into the immense guts of the Star; but the thick darkness beyond the window made her claustrophobic, trapped. She retreated into herself. She tended the fretting pigs, slept as much as she could, and kept her eyes averted from Hork's.

His determined efforts to talk to her, on the third day, were an intrusion.

"You're pensive." His tone was offensively bright. "I hope this adventure isn't causing you any - ah - philosophic difficulties."

He'd left his console and had drifted up the cabin, close to her station near the pigs' harness. She stared at the broad, fat-laden face, the mound of beard around his mouth. When she'd first been introduced to Hork she'd been fascinated and disconcerted - as Hork intended, no doubt - by that beard, by this man with hair on his face. on his face. But now, as she looked closer, she could see the way the roots of the beard's hair-tubes were arranged in a neat hexagonal pattern over Hork's chin... The beard had been transplanted, either from Hork's own scalp or from one of his more unfortunate subjects. But now, as she looked closer, she could see the way the roots of the beard's hair-tubes were arranged in a neat hexagonal pattern over Hork's chin... The beard had been transplanted, either from Hork's own scalp or from one of his more unfortunate subjects.