THE BONES OF ARGINIAR

Sixty feet above the drainage sumps of Shaft Nine, James Mackridge hung in a leather cradle that creaked with every shift of his weight, and the weight down here was never small. Arginiar pulled a man toward its floor at one-point-two-two times what his bones had been built for, and after three years underground his knees still complained about it on the ladders, his lower back ached in the cradle, and his shoulders burned now as he leaned into the packing gland and worked the retaining nut with a twelve-inch spanner that seemed to weigh as much as a shovel.

The hydraulic line in front of him ran the full length of the gallery, a rust-scaled artery eight inches thick that carried pressurized drainage fluid up out of the sump pits and into the settling tanks three levels above. It thrashed against its heavy steel saddle clamps with a violent, bucking shudder that rattled the teeth in James's skull. He could feel the convulsion through his wrists before he ever touched the housing, a dull arrhythmic knock that meant the packing around the rod had worn through and was letting fluid weep past the seal in a fine, scalding mist. He had been sent up to fix it because he was the smallest man on shift who could still turn a wrench with any conviction, and because at seventeen his hands had not yet stiffened the way his father's had.

The heat at this height was worse than at the floor. Thirty-six degrees centigrade sat on him like a wet blanket, and sweat ran steadily down the channel of his spine and pooled at the waistband of his dungarees. The air smelled the way it always smelled this deep: wet rust from the condensation that beaded on every exposed pipe, the sour tang of sulfur grease packed thick around every fitting to keep the acid vapors from eating the threads bare, and underneath all of it a thin electrical sharpness, like scorched copper wire, that came off the overworked pump motors somewhere below. It hit the back of the throat with every breath, clinging to the tongue and teeth long before a man ever surfaced to the barracks galleries where the air was metered thin.

He braced his boot against the cradle's crossbar and leaned his full weight into the spanner. The nut gave with a shriek of old thread, and a thin jet of brown hydraulic fluid caught him across the forearm before he could twist away. It burned, not with the violence of the acid slurry two hundred feet below, but with an ordinary chemical sting that would leave a rash by morning if he didn't scrub it off with the gray lye soap in the wash trough. He sucked air through his teeth and kept working.

"You bleeding up there, boy?" his father's voice came up from below, pitched to carry over the drone of the pumps.

"Just the line," James called back. "Packing's shot clean through."

"Figured as much. She's been knocking for two weeks."

Walter Mackridge stood on the catwalk sixty feet down, a gray shape against the orange glow of the sump lights, his iron pipe-wrench resting on his shoulder the way another man might carry a rifle. He had reported the knocking line to the shift foreman eleven days running, and eleven days running the foreman had told him parts were backordered from the surface and he'd have to make do. So Walter had done what he always did for thirty years, sending his son up into the cradle with whatever packing material the stores would release and trusting the boy's hands to finish what the company wouldn't pay to prevent.

James fed a new ring of graphite packing into the gland, seated it with the blunt end of a punch, and began working the retaining nut back down by hand before he brought the spanner to bear. Below him the sump itself churned, a wide black pit of drainage water and ground slurry that caught the lamp light in oily smears. The sump water here ran only mildly corrosive, just enough acid leached from the ore face to pit unprotected steel within a season, nothing like the boiling stope slurry two hundred feet lower where the real ore cutting happened. Still, a man who fell from this cradle would not drown so much as he would be slowly stripped, and James kept both hands on something solid at all times, the way his father had drilled into him since he was twelve years old and first lowered down on a line to check a strainer basket.

The spanner bit the final quarter turn home, and the knock went out of the line as if someone had thrown a switch. James pressed his palm flat against the housing and felt only the ordinary thrum of fluid under pressure, steady and even, nothing fighting against a torn seal anymore. He exhaled, and for a moment, suspended there in the heat and the stink, he let himself feel something close to satisfaction. It wouldn't last. Nothing down here lasted. But for an hour, maybe a shift, the line would hold, and that was as much victory as Shaft Nine ever handed out.

"She's quiet," he called down.

"Then get your ass down here before the next bell. Hobbs'll dock us both if we're still up top when the relief crew comes through."

James worked the cradle's hand-crank until the leather seat descended in slow, juddering stages, the pulley wheel above him screeching with the same neglect as everything else in Shaft Nine. By the time his boots touched the catwalk grating, his thighs were trembling with the accumulated strain of three hours spent fighting gravity that wanted, always, to pull him down into the black water below. His father reached out and steadied him with one hand, a reflex gesture neither of them commented on.

Up close, in the orange light, Walter Mackridge looked older than his fifty-four years. His shoulders had taken on a permanent stoop from four decades of ducking under low headings, and his hip canted at an angle that made his walk a kind of rolling shuffle, favoring the joint that had never set right after a rockfall when James was still in diapers. Coal dust and basalt grit had worked so deep into his gray hair that no amount of washing brought it fully clean anymore, and his left hand, missing its index and middle fingers to a cable snap fifteen years back, closed around the haft of his wrench with the remaining fingers in a grip that had compensated so thoroughly James sometimes forgot the fingers were gone at all.

"Packing held?" Walter asked, though he already knew the answer from the quiet of the line.

"Held. For now. Same housing's going to need a full rebuild inside a month, not just a repack. Seats are scored."

"Tell that to Hobbs. See how far it gets you." Walter spat to the side, a habit from a man whose throat was perpetually coated in rock dust. "Company'll run her till she blows a seam, then write it up as unforeseen mechanical failure, like God himself snuck down here and sabotaged the line."

James said nothing to that. There was nothing to say that his father hadn't already said a thousand times, in a thousand variations, over a thousand shifts. The Consolidated Sump and Mineral Combine owned Shaft Nine and every bolt and valve inside it, and the Combine's engineers up on the surface decided what got fixed and what got run into the ground, and nothing a sump-mechanic and his son said from sixty feet below the waterline was going to change the order of operations.

A deep bell tolled twice through the gallery, muffled by rock and distance but unmistakable, the signal for end of shift. Around them the other men on the drainage crew began breaking down their stations, coiling hose, racking tools in the long steel lockers bolted to the gallery wall. Nobody spoke much. Nobody had the breath to spare for conversation after ten hours in this heat, under this weight, breathing air that the company metered down to the legal minimum oxygen percentage and not one part per million more.

James and Walter fell into step with the shuffling line of miners making for the lift cage that would carry them up through four hundred feet of shaft to the residential levels. The cage was a steel box with an open grate for a door, and it dropped and climbed on a cable system that groaned under every load like it resented the work. Twenty men crowded into a space meant for maybe fifteen, packed shoulder to shoulder in the dark, breathing each other's sweat and chicory-stained breath while the cage rattled upward past level markers stenciled in fading yellow paint.

Nobody spoke on the ride up either. James had learned early that conversation in the cage marked a man as green, someone who hadn't yet absorbed the lesson that talk cost oxygen and oxygen cost scrip, and every man in that box had already spent his daily allotment on labor the company didn't pay enough to replace.

The cage shuddered to a stop at Level Forty-Eight, and the gate rattled open onto the residential gallery, a long tunnel of rough-cut rock lined on both sides with company notice boards, ration windows, and the mouths of barracks corridors that ran back into the stone like the burrows of some vast colonial insect. The air here was thinner than the sump levels, filtered and recirculated through scrubbers that the Combine maintained to the exact legal standard and no further, and it still carried, even after passing through three stages of filtration, the ever-present mineral tang of basalt dust.

A crowd had gathered at the central notice board, the kind of crowd that formed whenever new postings went up, and James felt his stomach tighten before he even got close enough to read the print. Walter saw it too. His father's jaw set, and his pace slowed, not from fatigue this time but from the particular reluctance of a man who already suspected what bad news looked like from fifty feet away.

They pushed in close enough to read the board over the shoulders of men who stood staring at it in the kind of silence that meant the numbers had already landed. The flour ration, printed in the Combine's clean corporate typeface beside a stamped authorization seal, had climbed from twenty-two chits per sack to thirty-one. Clean water, the kind drawn from the deep filtration cisterns rather than recycled sump runoff, had gone from four chits a gallon to seven. At the bottom of the posting, in smaller print that a tired man could easily miss after a ten-hour shift, a line explained that the increases reflected adjusted transport costs following the recent expansion of the Blackwood Drift and were effective immediately, with no grace period for previously purchased ration cards.

"Seven chits a gallon," Walter said, low, more to himself than to James. "Martha drinks near two gallons a week on her own, between the washing and the kettle for her chest."

James did the math without wanting to. His own wages, after the automatic deductions for housing, air, and the standing debt his father had carried since before James was born, left him something under forty chits a week to put toward food and water for three people. The old flour price alone had eaten most of that. The new price would eat all of it, and then some, and there was still the respirator paper Martha needed replaced every eight days, and the medicine the company clinic sold for her lungs at a markup that would have been criminal anywhere men still had the luxury of calling things criminal.

"They'll adjust wages to match," James said, though he didn't believe it even as the words left his mouth.

"They'll adjust nothing," Walter said. "You've been down here three years, boy. You've seen them adjust prices eleven times and wages twice, and both those times it was less than half a chit on the hour." He turned away from the board, his bad hip giving its characteristic hitch as he pivoted. "Come on. Your sister'll be wondering where we've gone."

They walked the rest of the gallery in the silence that had become their default language, past the ration windows where a line of women waited with chit-cards clutched tight, past a company bulletin announcing an increase in output quotas for the lower drifts effective at the start of the next cycle, past the mouth of a side corridor where a man James vaguely recognized from the pump crew sat slumped against the wall with his respirator mask pushed up on his forehead, coughing in a way that sounded wet and final. Nobody stopped to help him. Nobody had the air to spare for it. James saw his father's rolling stride hitch for only a fraction of a second, the worn leather of Walter's work boots hesitating against the pitted concrete before the old man forced himself forward. The iron wrench dug deeper into Walter's collarbone as his three good fingers tightened around the greasy haft into a white-knuckled vice. Walter never turned his head toward the dying miner, but James caught the dry, shuddering swallow that hitched his father's throat. James knew that sound. It was the same hollow rattle he heard rising every morning from Walter's own chest—the chalky, slow suffocation of white-spit silicosis, hardening lung tissue to dry pumice until dragging down a single breath became the heaviest labor of a ten-hour shift.

The residential patch they called home sat deep in the barracks warren, a honeycomb of numbered cribs stacked three high along corridors barely wide enough for two men to pass shoulder to shoulder. Crib 114 was theirs, a steel-walled compartment perhaps four meters by three, fitted with two bunks, a fold-down table, and a single overhead light that hummed at a frequency James had stopped hearing years ago. It was home in the same way the sump was a workplace, which was to say it was simply the space the Combine had allotted them, priced into their standing debt at a rate that assumed they would never finish paying it off.

Martha was on the lower bunk when they came through the hatch, propped against the wall with her knees drawn up and a paper respirator mask strapped to her face with a loop of twine that had rubbed a raw pink line into her cheek. She had the air-pump bulb in both hands, working it in slow, deliberate squeezes to force clean air through the mask's clogged filter element, and the sound of it, a soft wheeze followed by the rubbery give of the bulb, filled the small space along with her breathing.

"You're late," she said, her voice thin and muffled behind the paper.

"Line needed fixing," James said, dropping onto the edge of the upper bunk and beginning the slow work of unlacing his boots. "Packing gland blew through. Had to repack the whole seat."

"Did it burn you again?"

He glanced at the red welt rising along his forearm where the fluid had caught him. "Just a little. Nothing bad."

Martha lowered the pump bulb and studied him with the particular seriousness of a twelve-year-old who had spent most of her life around men who lied about the extent of their injuries. "It looks bad."

"It's not."

Walter had already crossed to the fold-down table and was unfolding it from the wall, the hinges groaning in a register that matched every other piece of worn metal in the crib. From the small cabinet above it he drew out a tin of their remaining flour, weighed it in his palm with the automatic assessment of a man who had learned to measure rationing by feel rather than by scale, and then reached beneath the lower bunk for the cigar box where the family kept its scrip chits.

He counted them out on the table in neat stacks, his lips moving silently as he worked through the sums, the ruined fingers of his left hand tapping each stack twice before he moved to the next. James watched from the upper bunk without being asked, because watching his father count their money had become its own kind of ritual, one that told him more about the state of things than any conversation ever did.

"How bad," James finally asked, when his father's silence stretched past the point of patience.

Walter didn't look up from the chits. "Bad enough. We've got sixty-one for the week, after the standing debt comes out. New flour price alone takes twenty-two of that if we buy the small sack. Water's another chunk, more now with the increase. Martha's filter paper is due replacing day after tomorrow, that's another eight." He pushed the stacks together into a single pile, as if consolidating them might somehow make the total larger. "We'll eat thin this week. Thinner than last."

"I can pick up an extra shift," James said. "Hobbs mentioned they're short on the night crew since Dawes went down with his knee."

"You're already pulling ten hours a day in that cradle. You put in a double on top of that and you'll be the one with a knee gone, or worse, a slip in the sump that nobody's around to fish you back out of." Walter scraped the chits back into the cigar box with the side of his good hand. "No. We make do with what we've got. We've made do before."

Martha had gone quiet on the bunk, the pump bulb resting loose in her lap, her eyes tracking between her father and her brother with the particular watchfulness of a child who understood far more about the family's finances than either man wanted her to. She pulled the mask down to rest around her neck, exposing a face that was pale even by the standards of people who hadn't seen real sunlight in their entire lives, with dark hollows beneath her eyes that no amount of sleep seemed to lighten. "I could pick slate longer," she offered. "Mrs. Abernathy said if I work past the evening bell she'll put in a good word with the overseer, maybe get me moved up to the better rate."

"You'll do no such thing," Walter said, sharper than he'd meant to, and then softened it with the next breath. "You work your shift and you come home and you rest that chest of yours. That's the whole of your job right now."

"But—"

"Martha." James reached across, his thumb gently catching the edge of her paper mask to ease the bite of the twine against her cheek. "Let us handle the chits. You just breathe easy. That's worth more to us than anything you'd earn on an extra hour of slate."

She looked like she wanted to argue further, the way she sometimes did when the guilt of being the family's smallest and least productive member got the better of her, but a cough took her instead, a deep, tearing sound that doubled her forward over her knees and left her gasping for air behind the mask she scrambled to pull back up over her mouth and nose. James was off the upper bunk and crouched beside her before the cough had fully run its course, one hand resting flat against her back, feeling the way her ribs worked too hard beneath skin stretched thin over them.

"Easy," he said. "Easy. In slow."

She nodded behind the paper, her small shoulders shaking with the effort of drawing breath through a filter that had been designed for industrial dust and never for lungs already half-ruined by years of exposure to the same. The pump bulb squeaked in her hand as she worked it, forcing what clean air the degraded filter could still manage through the mask and into her chest.

Walter had gone still at the table. His three good fingers pressed white against the pitted timber, watching his daughter fight for air the same way his own lungs had slowly collected fine rock dust over thirty years. The skin around his eye sockets bunched tight. It pulled the crow's-feet into deep gray gutters caked with dried basalt sweat. His lower jaw slid sideways. Back molars ground together, dry and audible in the cramped room. Neck muscles stood out taut, like hawser line strained toward its limit. Then his gaze dropped. He looked down into the scarred wood grain, his lips parting just enough to let through a single, dry exhalation that carried no sound at all.

Martha's breathing evened out after a minute, the cough subsiding into something more manageable, and she slumped back against the wall with the particular exhaustion of a child whose body had already spent the day's reserves on surviving a single fit. James stayed crouched beside her a moment longer before rising and returning to his own bunk, the metal frame creaking under his weight as he settled onto it.

"Dinner," Walter said, in the tone of a man deliberately redirecting a room away from a subject nobody could afford to dwell on for long. He pulled the small cook-pot down from its hook and set it on the single-burner heating plate bolted beside the cabinet, filling it with a careful measure of water from the jug they kept under the table, water that had cost them real chits and would be rationed accordingly. Into it went the last of the coarse salt and a measure of the cheap grain meal the company store sold in place of actual flour to families who couldn't afford the real thing, a gray, gritty porridge that filled the stomach without doing much else for a body.

They ate it from three tin bowls at the fold-down table, the overhead light humming above them, the muffled sounds of the barracks corridor filtering through the thin steel walls, other families settling into their own cribs for whatever rest the night cycle allowed before the morning bell called the shift crews back down into the dark. Nobody spoke much during the meal. There wasn't much left to say that hadn't already been said, and a man learned early in Shaft Nine that conversation, like everything else down here, was a resource to be spent carefully.

Martha ate slowly, her mask pushed up onto her forehead between bites, each spoonful punctuated by a small pause as if the act of swallowing required its own kind of concentration. James watched her from across the table without meaning to stare, and found himself doing the arithmetic his father had been doing for years: balancing their desperate needs against wages that the Combine set and reset according to some manifest on the surface that none of them would ever see.

"When I was little," Martha said, apropos of nothing, her voice soft around a mouthful of porridge, "did it ever rain down here? Before they sealed it all up, I mean. Before the levels."

Walter looked up from his bowl, something in his weathered face softening at the question, the same way it always did when Martha asked about things she had never seen and would likely never see. "No, girl. Never rained down here. This whole world was rock and ice on the surface long before the company ever cored the first shaft. Nothing up there to rain." He set his spoon down. "But I've heard tell, on worlds where men still live under open sky, that rain falls soft, like someone pouring water through a fine screen. Falls on your face and you don't even feel the weight of it."

"I'd like to feel that," Martha said. "Just once."

"Maybe you will," James said. "Maybe someday we get enough chits together, buy passage up top, out past the quarantine line. Plenty of worlds with open sky out there."

Martha smiled at that, small and tired behind her mask, the kind of smile that cost her more effort than it should have. She didn't argue the point, though James suspected she understood, better than either of them wanted to admit, how far out of reach that kind of future actually sat. A family with standing debt the size of theirs did not simply buy passage anywhere. The Combine owned the only ships that left this world, and the Combine did not grant transport to men who still owed it money, which was, by design, every man who had ever worked a shift in Shaft Nine.

They finished the porridge in the kind of quiet that follows a meal too small to satisfy, scraping the last of it from the tin bowls with the edges of their spoons. Walter collected the bowls and set them in the narrow basin for washing in the morning, since water was too dear now to spend on dishes before bed. Martha curled onto the lower bunk, pulling the thin blanket up to her chin, her respirator mask resting beside her pillow for the overnight hours when the barracks air scrubbers ran at their lowest, most economical setting and every resident crib needed the paper filter close at hand.

James climbed onto the upper bunk and lay back against the thin mattress, his body finally registering the full weight of the day's labor now that the distraction of eating had passed. His arms ached from the cradle work, a deep muscular fatigue that no amount of rest down here ever fully resolved, and the burn along his forearm had settled into a dull throb that he knew would still be there come morning. He closed his eyes and let the ordinary sounds of the barracks wash over him: the distant hum of the air scrubbers, the murmur of a family arguing softly two cribs down, the metallic creak of the whole structure settling under the mass of rock pressing down on it from above.

He had nearly drifted into sleep when the floor moved.

It wasn't a large movement, not at first. A low shudder passed through the deck plates beneath the bunks, subtle enough that James might have dismissed it as the ordinary rumble of some distant piece of heavy machinery, a rotary mill grinding ore three levels down, or the rhythmic thud of an ore-car coupling onto its line. He had felt a thousand such tremors in his years underground, and his body had learned to sleep through most of them the way a man learns to sleep through the sound of his own heartbeat.

This one was different. It came again, longer this time, a deep grinding scrape that traveled up through the bunk frame and into his spine, and on the fold-down table below, the three empty tin cups they kept for drinking water rattled against each other with a thin, bright sound that cut through the usual industrial drone of the barracks.

James opened his eyes.

"You feel that?" he said, pitching his voice low so as not to wake Martha if she had already drifted off.

From the lower bunk, Walter's voice came back immediately, which told James his father hadn't been asleep either. "Felt it."

The tremor passed, fading back into the ordinary ambient vibration of the pit, and for a moment James thought that might be the end of it, another seismic hiccup in a world whose crust groaned constantly under the weight of a thousand mining operations. He had felt worse tremors than this one. Deep blasting on the lower levels sometimes rattled the barracks hard enough to knock tools off their racks. But something about the quality of this tremor sat wrong with him, a kind of wrongness he couldn't immediately put a name to. It hadn't had the sharp, percussive character of a blast, the single violent concussion followed by settling aftershocks. This had been slower. More deliberate. Almost rhythmic, as if something very large and very patient were pressing steadily against the rock somewhere far below, testing it the way a man tests a locked door before deciding whether to force it.

James swung his legs over the side of the bunk and dropped down onto the cold floor plates, careful to land soft so as not to jar his already protesting knees. Walter had propped himself up on one elbow, watching his son with the particular alertness of a man who had spent thirty years learning to read the moods of rock through the soles of his boots.

"Probably just the deep drifts," Walter said, though his voice carried none of the conviction the words were meant to deliver. "They've got crews cutting new faces down past Level Ninety, way I hear it. Could be shockwave off a blast, carrying strange through a fault line."

"Didn't sound like a blast."

"No," Walter admitted. "Didn't."

James crouched and pressed his palm flat against the deck plate, feeling for any residual vibration, and found only the low, steady thrum of the barracks' own systems: the air scrubbers, the water lines, the distant hum of the lift cages somewhere beyond the corridor. Nothing that explained what he had just felt. He glanced toward the lower bunk, where Martha still lay curled beneath her blanket, her breathing shallow but even, undisturbed, apparently, by whatever had passed through the floor a moment ago. Small mercies.

"I'm going to listen," James said.

"Listen to what? There's nothing to hear. It's gone."

"Might not be gone. Might just be quiet right now." James was already lowering himself to the floor, stretching out on his stomach along the cold steel plating, the posture of a man settling in to work beneath a stalled piece of machinery rather than a man preparing to sleep. "You taught me that yourself. Rock talks if you listen right. You've told me a hundred times, you can hear a shaft wall thinning out before it ever shows a crack, if you know how to put your ear to it."

Walter said nothing to that, which James took as tacit permission, or at least tacit resignation. He pressed the side of his face flat against the deck plate, turning his head so his ear lay directly against the cold metal, and closed his eyes to shut out every other sense but hearing. At first there was nothing but the ordinary industrial hum of Shaft Nine transmitted up through seven miles of basalt and steel decking: the deep, almost subsonic thrum of the great rotary mills somewhere far below, a vibration so constant and so foundational to life in the pit that most men stopped consciously perceiving it within their first year of service. Beneath that, fainter, the rhythmic clatter of distant ore-cars coupling and uncoupling along their rail lines. Beneath that, fainter still, the dry hiss of thin air pushing through the iron flues. James held himself still and let his breathing slow, the way his father had taught him years ago when teaching him to read a shaft wall for the early signs of fatigue cracking, a skill built on patience and the kind of attention most people never had cause to develop. Seconds passed. Then, beneath all the familiar layers of industrial noise, he found it: a new sound, faint enough that a less practiced ear would have dismissed it entirely as imagination, but present, unmistakably present, threading through the rock in a pattern too regular to be anything but deliberate.

It was a scratching sound, if scratching could be scaled up to a register that traveled through solid stone. A rhythmic, grinding scrape, repeating at intervals of perhaps two seconds, each cycle followed by a brief pause and then a soft grating reset. It was organic in its irregularity, patient in a way no machinery down here had ever been built to run, rising from depths miles past any working stope.

He lay there with his ear pressed to the deck plate, tracking the rhythm through the cold steel. The sound carried an unmistakable wetness, a heavy, salivating grind through matter that sheared and gave under pressure, diamond-hard mandibles chewing through bedrock rather than cutting it.

"James." His father's voice, sharper now, cutting through the trance of his listening. "What do you hear?"

James lifted his head from the deck plate slowly, as if moving too fast might startle whatever was making the sound into silence. He sat up and looked at his father in the dim overhead light, and found that Walter had risen from the lower bunk and was standing now, favoring his bad hip, his face drawn into an expression James had rarely seen on him, something closer to genuine unease than the chronic, grinding exhaustion that had become his father's baseline expression over the years.

"It's not drilling," James said quietly. "Not any drill I've worked around. It's too regular to be a rockfall settling, and too slow to be a rotary bit. It sounds like..." He hesitated, searching for the right comparison. "It sounds like something chewing. Through rock. Diamond on stone, maybe, but not spinning. Gnawing. Like a rat working through a timber beam, except a thousand times the scale of it, and coming up from somewhere a long way down."

Walter's jaw tightened, and for a moment he said nothing, his eyes moving instinctively toward the deck plate as if he might somehow see through seven miles of solid rock down to whatever was producing the sound his son had just described. The overhead light hummed on, indifferent, and somewhere down the corridor a child cried briefly before being hushed by a tired parent, the ordinary noise of the barracks continuing on around them as if the floor hadn't just shuddered with something that defied every mechanical explanation either of them had available.

"Assay crews have been working the deep faults past Ninety for a few weeks now," Walter said finally, though his voice carried the flat, careful tone of a man talking himself through a problem rather than stating a settled fact. "Heard talk in the gallery. Said they pulled up core samples that didn't look right. Pitted. Eaten through, like something had been at them with acid, long before any company drill ever touched that rock." He rubbed at his jaw with his remaining fingers, a habitual gesture James recognized from every difficult decision he'd ever watched his father make. "Could be natural. Old fault lines full of mineral acid, eating through soft seams over a few million years. Company geologists'll have some explanation for it, dress it up nice in a report nobody down here ever gets to read."

"And if it's not natural?"

"Then it's none of our business tonight," Walter said, more firmly now, the decision settling into his voice the way it always did once he'd finished turning a problem over in his hands. "We're sump crew, not assay. Whatever's down past Ninety is a hundred levels below anything we touch. You go poking around questions that aren't yours to ask, all you get for it is a reprimand from Hobbs and a docked shift for wasted time." He crossed to the lower bunk and sat heavily on its edge, the old frame complaining under his weight. "Come morning, we've got our own line to worry about. That packing's only going to hold so long before she starts knocking again, and we'll be right back up in that cradle whether the company's replaced the housing or not."

James remained seated on the floor a moment longer, his palm still resting flat against the cold deck plate, waiting to see if the sound would repeat itself now that he knew to listen for it. It did not come again, not in any way he could detect without pressing his ear back down, and some part of him wanted to do exactly that, to lie there through the night if necessary and track the pattern of it until he understood what it meant. But his body had already begun registering the full cost of the day's labor again now that the adrenaline of discovery was fading, and his father's voice carried the particular weariness of a man who had decided the conversation was finished whether his son agreed or not.

"Get up off that floor and get some sleep," Walter said. "You've got a full shift again tomorrow, and that cradle work'll take everything out of your arms whether you've rested or not. Worrying about noises a hundred levels down isn't going to fix a single thing tonight."

"It wasn't like anything I've heard before, Pa."

"I believe you," Walter said, and something in the plainness of the admission carried more weight than any reassurance might have. "But believing you and being able to do a damn thing about it from Crib 114 at this hour are two different animals. If it's something the company needs to know, the assay crews will flag it through their own channels, and if it's nothing, you'll have cost yourself a night's rest over a sound the rock makes when it settles." He lay back on the bunk and pulled the thin blanket up over himself, the mattress springs creaking under the shift of his weight. "Rock's always talking, James. You know that better than most boys your age. Learn which parts of it are worth losing sleep over."

James pushed himself up off the floor, his joints protesting the high gravity's steady insistence on every motion, and climbed back onto the upper bunk. He lay on his back in the dim light, staring up at the close steel ceiling of the crib, and found that sleep did not come as easily as it usually did after a ten-hour shift in the sump. His ear still carried the memory of that sound, the patient, grinding rhythm of it working through solid stone from some depth he couldn't begin to calculate, and no amount of his father's practiced calm fully settled the unease it had left behind. Below him, Martha stirred slightly in her sleep, her breathing catching for a moment before evening back out into its shallow, familiar rhythm, undisturbed by whatever conversation had passed above her. Walter's breathing, too, soon settled into the slow, heavy cadence of exhausted sleep, punctuated every so often by the faint wet rasp that had become permanent in his chest over the last several years. James lay awake longer than either of them, listening to the ordinary sounds of the barracks around him, the distant hum of air scrubbers working at their nighttime minimum, the faint murmur of neighboring families settling in for whatever rest the schedule allowed before the morning bell called the whole gallery back down into the dark. He kept waiting, without entirely admitting to himself that he was waiting, for the floor to shudder again, for the tin cups on the table to rattle once more against each other in that thin, bright warning note. Yet beneath the waiting, the sheer physical attrition of Shaft Nine settled into his marrow. His biceps twitched with residual cramps from three hours of fighting the twelve-inch spanner against high-pressure saddle clamps, the heavy 1.22g pull dragging at his chest like an iron plate. His throat burned with the lingering taste of sulfur grease, copper ozone, and the sour chemical sting of hydraulic mist that clung to his skin no matter how hard he scrubbed. The air in Crib 114 was heavy, foul, and depleted, throttled down to the bare legal minimum to squeeze another hour of profit from their lungs. Down here, fatigue was not a release but another weight to bear, an endless mechanical toll that wore a man down one joint, one breath, and one turn of the wrench at a time. The tremor did not return that night. But somewhere far below Crib 114, past the sump levels and the drainage galleries and every depth James Mackridge had ever been sent to work, something continued its slow, patient progress through seven miles of basalt, one grinding pass at a time, and the rock above it had no voice left to raise in warning beyond the faint, rhythmic scratching that only a boy pressing his ear to cold steel in the dead of the night cycle had thought to listen for.