The Apprentice of the Comet Harvester

• Chapter 1 Sparks in the Rust
• Chapter 2 The Call of the Arc
• Chapter 3 Boarding the Harvester
• Chapter 4 Iron and Ice
• Chapter 5 The Master Mechanic
• Chapter 6 Whisper of the Steam Engine
• Chapter 7 First Orbit
• Chapter 8 Reading the Tail
• Chapter 9 The Grappling Rig
• Chapter 10 Sub-Zero Calibration
• Chapter 11 Into the Vapor
• Chapter 12 Fracture Line
• Chapter 13 The Pressure Leak
• Chapter 14 Silent Vacuum
• Chapter 15 Piston and Heartbeat
• Chapter 16 The Melting Core
• Chapter 17 Rogue Fragment
• Chapter 18 Emergency Overdrive
• Chapter 19 Heavy Water Harvest
• Chapter 20 Sparks in the Void
• Chapter 21 The Broken Harpoon
• Chapter 22 Cold Welding
• Chapter 23 The Trajectory Shift
• Chapter 24 Tanker Full
• Chapter 25 Journeyman's Mark
• Chapter 26 Beyond the Perihelion

The air inside Bay 9 always tasted like scorched copper and old grease, a heavy, static mixture that settled on the back of your tongue and stayed there for hours after the shift ended.

Lars adjusted his heavy leather goggles, pushing them up onto his forehead to wipe a streak of sweat and carbon dust from his eyes. Beneath his boots, the open-mesh catwalk vibrated with the low, steady thrum of the orbital station’s primary ring. Three hundred meters below him, suspended in the shadow of the drydock frame, lay the hull of a decommissioned tug—a pitted, iron-ribbed beast that had spent fifty years hauling ice freighters before its pressure vessels finally fatigued.

He ignited the handheld cutting torch with a sharp clack-clack of the flint striker. A narrow, bright blue flame erupted from the nozzle, hissing violently against the ambient air of the pressurized staging bay.

"Keep the angle at forty-five degrees, kid," a voice crackled through the overhead speaker system. It was Vance, the lead yard foreman, watching from the glass-walled observation booth fifty meters up. "You’re not trying to melt the damn ribbing. You’re just trying to pop the shear pins. If you burn through the main beam, I’m deducting the alloy out of your week's rations."

"Got it," Lars muttered, though he knew Vance couldn't hear him through the local com-link unless he keyed his collar mic.

He touched the tip of the flame to the rusted collar of a primary mounting pin. The oxidized steel glowed dull orange, then bright yellow, before giving way with a loud, metallic bang that shuddered through the soles of his work boots. A shower of white-hot sparks erupted from the seam, raining down through the open grate into the dark expanse of the lower containment netting.

Lars watched the sparks fall. They flickered, cooled into glowing embers, and dissolved into the gloom like dying stars.

At nineteen, Lars had spent nearly half his life in the orbital yards of Pallas Staging Station. He was short, lean, and possessed hands that were perpetually stained at the knuckles with dark, indelible machine oil. While other boys his age sought berths on the short-haul freight lines or applied for administrative clerkships back on Ceres, Lars had stayed in the damp, loud, and dangerous lower docks. He liked the weight of a heavy wrench. He liked the smell of hot metal and the predictable, mathematical logic of mechanical systems. If a valve leaked, it was because a seal was cracked or a seat was scored. It didn't lie to you, and it didn't hold a grudge.

He moved his torch to the second pin. The steel here was stubborn, fused together by decades of vacuum welding and cosmic radiation. He leaned into the cut, applying steady pressure with his left arm while his right hand metered the oxygen flow.

Beyond the open drydock doors, the main belt stretched out into infinity. It wasn't the dense field of floating boulders that the old flat-screen vids liked to show back in the planetary stations; space was mostly empty, cold, and dark. But every few months, a real target swept in from the outer reaches of the system—a long-period comet, fresh from the Oort cloud, dragging a tail millions of kilometers long and loaded with trillions of tons of volatile compounds.

Water. That was what made the wheel turn. Water for reaction mass, water for oxygen, water for drinking, water for the massive hydroponic farms that kept three million people from starving in the dark.

And water didn't mine itself. It took the Harvesters—massive, reinforced ironclads equipped with heavy thermal drills, steam-powered grapples, and high-capacity condensers—to match velocities with a jagged block of ice tumbling through the void at forty kilometers a second, bite into its crust, and strip it clean before it swung around the sun and baked into dust.

"Lars! Wrap it up down there!" Vance’s voice barked again through the speakers, cutting through the hiss of the torch. "Shift change in ten. And the Caelum Prime just logged into the outer approach vector. They’re clearing the main slip for her."

Lars killed the gas valve on his torch. The blue flame snapped out, leaving behind only the hot, red glow of the cooling metal and the smell of ionized oxygen.

He hooked the torch to his tool belt, pulled his leather gloves off, and looked out past the drydock’s safety rigging.

Visible through the wide, thick-paned bay portal, a shape was silhouetted against the distant glare of the sun. It was huge—far larger than the standard orbital freighters or the sleek, torpedo-like navy cutters that occasionally passed through for refueling. It looked less like a ship and more like a floating industrial city that had been battered by a mountain range and cobbled back together with iron plate and heavy rivets.

Its bow was dominated by a massive, blunt-nosed reinforced plow, scarred by millions of microscopic impacts and pitted by thermal shock. Flanking its flanks were the immense housing bays for the primary harpoons—steel cables as thick as a man's waist, wound around high-pressure steam winches capable of dragging a billion-ton ice fragment into alignment.

It was the Aethelgard, one of the oldest heavy Harvesters still in active service.

Lars watched, hypnotized, as the great ship fired its RCS thrusters. Great plumes of superheated steam vented from its flanks, glowing white against the black void as they controlled its pitch and yaw. The ship wasn't elegant. It didn't have the clean lines of the inner-system transports. It was ugly, loud, and functional, built entirely to survive the brutal, sub-zero hell of an active cometary coma.

"She’s a beauty, isn't she?"

Lars turned to see Old Miller standing at the end of the catwalk. The veteran mechanic was leaning against the safety rail, chewing on an unlit synthetic pipe. One of Miller’s eyes was natural brown; the other was a brass-rimmed mechanical optic that clicked and whirred softly as it adjusted its focus on the distant Harvester.

"Looks like she took a beating on the last run," Lars said, stepping over to join the older man. "Look at the port condenser shield. Half the radiator fins are warped."

"That wasn't the last run," Miller grunted, his artificial eye zooming in with a soft hum. "That was two runs ago, off 67P. They got caught in a localized outgassing event. A jet of high-pressure methane blew out of the crust right beneath their secondary anchor. Took out three radiator banks and tore the gantry clean off the superstructure."

"Did they lose the haul?" Lars asked.

"Lose it?" Miller gave a dry, raspy laugh. "Master Mechanic Vane doesn't lose hauls. He jury-rigged a bypass using the secondary boiler lines, clamped the ship straight to the ice core with three manually driven ice spikes, and stripped forty thousand tons of heavy water out of the core while the whole damn rock was spinning out of control."

Lars looked back at the ship, his eyes tracing the massive, soot-stained hull plates. He had heard stories about Vane. Everyone in the lower docks had. He was a legend among the grease-monkeys—a man who had spent forty years in the belly of the Harvesters, who could diagnose a bad turbine bearing just by putting his palm against the deck plates, and who had survived three separate hull breaches without losing a single finger.

"They're taking on fresh crew," Miller said casually, tapping the bowl of his pipe against his palm. "Apprentices, mostly. The high-g runs and the cold stress take a toll on the young ones' lungs. Half the greenhorns quit after their first perihelion passage. The other half get broken by the machinery."

Lars felt a sudden, sharp tightening in his chest. "They're hiring here? On Pallas?"

"Application window opened an hour ago at the yard office," Miller said, his mechanical eye fixing on Lars with a strange, unreadable expression. "Vane personally requested three junior techs from the yard maintenance pool. Wants kids who already know how to handle an oxy-arc torch and don't cry when they get oil on their coveralls."

Lars looked down at his soot-stained hands, then back out the window at the Aethelgard. The ship was slowly gliding into berth three, its huge docking clamps extending like the talons of some mechanical bird of prey. Thick umbilical lines were already swinging out from the station towers to lock onto its pressure seals.

"Vance will never sign off on my transfer," Lars said quietly. "I'm the only one in Bay 9 who knows how to re-thread the old pneumatic pumps."

"Vance is a middle-management bureaucrat who thinks a torque wrench is a hammer," Miller spat, looking down into the dark bay. "If you stay here, Lars, in five years you’ll be doing the exact same thing you did today. You'll be cutting up old rust-buckets for scrap, breathing in iron dust until your lungs turn to stone, and watching the real ships sail out past the edge."

Miller stepped closer, laying a heavy, calloused hand on Lars’s shoulder.

"You've got good hands, kid. You listen to the metal. You don't just hit it until it moves. But hands don't mean a damn thing if you leave 'em in the scrap heap."

The station horn blew, a deep, vibrating chime that signaled the official end of the first shift. Down below, the work lights began to dim to their low power setting, casting long, geometric shadows across the rust-flaked deck plates of Bay 9.

Lars didn't move for a long moment. He watched the heavy docking clamps lock onto the hull of the Aethelgard with a violent shudder that shook the glass of the observation windows. Steam hissed from the ship's pressure relief valves, clouding the dark void around it in a swirling, white mist.

He pulled his goggles off, folded them carefully, and slotted them into the tool loop of his leather apron.

"Where's the sign-up desk?" Lars asked.

Old Miller grinned, his brass optic clicking as it locked into place. "Deck Four, section B. And Lars—don't clean your face. Vane likes 'em dirty. Shows you've actually been working."

Deck Four, Section B smelled distinctly different from the maintenance bays. Up here, near the administrative spine of Pallas Staging Station, the air had been scrubbed clean through three stages of chemical recycling. It was cool, dry, and lacked the familiar warmth of fried insulation and hot iron. It tasted synthetic, like plastic wrap and recirculated nitrogen.

Lars stood near the back of a line that already stretched thirty meters down the corridor.

There were nearly forty candidates ahead of him. Some were young station workers like himself, clad in scuffed canvas trousers and greasy work jackets, their fingers calloused and stained. Others were polished graduates from the Ceres Technical Institute, wearing immaculate blue overalls with silver zip-closures and clean, soft hands that had never touched a wrench without wearing padded gloves. They held digital slate-pads, nervously scrolling through theoretical schematics for high-pressure boilers and thermodynamic transfer systems.

Lars had no slate-pad. He had his heavy leather work belt slung over his shoulder, a grease-stained brass pocket rule tucked into his breast pocket, and a smudge of soot across his cheekbone that Old Miller had told him to leave intact.

"Look at this guy," a voice sneered from ahead of him.

Lars turned his head slightly. The speaker was a tall, lean youth with slicked-back hair and the pristine jacket of a Junior System Inspector. On his chest, a brass badge read R. Vane-certified candidate.

"Did you wander off the scrap gang, kid?" the inspector’s buddy asked, chuckling. "This is the line for the Aethelgard mechanical track, not the refuse sorting bin."

Lars didn't blink. He adjusted his heavy tool belt on his shoulder, letting the iron wrenches clatter together with a heavy, bell-like ring. "Refuse sorting’s on Deck Nine," Lars said plainly. "You should head down there. They’re always looking for trash."

A couple of the grease-monkeys further back in line chuckled. The polished tech puffed out his chest, opening his mouth to reply, but the thick steel hatch at the front of the corridor hissed open before he could speak.

A tall, broad-shouldered woman with iron-gray hair cut flush to her skull stepped out into the hall. She wore heavy leather trousers tucking into thick-soled work boots and a grease-blackened vest over a faded red undershirt. Her left forearm was completely covered in dark, puckered burn scars that looked like the surface of a cooled lava flow.

"Quiet down!" she barked. Her voice was like two gravel bags slamming together. "I’m Chief Mate Garra. Master Mechanic Vane doesn't have time to read your resumes, and he sure as hell doesn't care about your academy diplomas. If you came here with a piece of paper telling us how smart you are, you can turn right around and go back to your desk jobs."

A murmur ripples through the line of tech graduates.

Garra didn't wait for them to process it. She motioned toward the open hatchway behind her. "Inside. Five at a time. The rest of you wait against the bulkhead. Keep your mouths shut or I’ll throw the whole lot of you out the airlock."

The line lurched forward. Lars stepped along with the flow, keeping his head down and his ears open.

Inside the testing chamber, the polished, air-conditioned smell of Deck Four vanished instantly, replaced by the crackle of high-voltage transformers and the sharp, piercing stench of electric arcs cutting through raw plate. The room was huge—a converted cargo vault outfitted with heavy iron workbenches, overhead gantry cranes, and several massive power distribution blocks connected to industrial arc-welding rigs.

Standing in the center of the vault was a man built like a hydraulic press.

He wasn't tall, but he was impossibly broad, with shoulders that stretched the seams of a salt-and-pepper canvas coat. His head was completely bald, crisscrossed by thin white scars, and his beard was a thick, unruly mass of dark grey wire. He wore no goggles, only a thick pair of tinted spectacles pushed up onto his brow. His left eye was permanently squinted, as though he were forever looking into the glare of an open furnace.

Master Mechanic Vane.

Vane didn't look up as the first group of five candidates approached his bench. He was holding a heavily worn steel valve casing, examining its internal threads with a small brass magnifying glass.

"First five," Garra announced, tossing a handful of brass tokens onto the table. "Two tech-cadets, three yard-hands."

Vane set the valve down with a heavy thud that shook the bench. He turned his squinting gaze onto the young men standing before him. His eyes hovered over the polished blue uniforms of the institute boys, then flicked down to their soft, unblemished hands.

"You," Vane grunted, pointing a thick, blunt finger at the nearest tech-cadet—the tall one who had made the joke in the corridor. "What’s your name?"

"Kort, sir! Top five percent of my class at the Ceres—"

"I didn't ask for your transcript, Kort," Vane interrupted, his voice a low, rumbling growl. "I asked your name. See that test-bench over there?"

He pointed toward a steel bench equipped with an unpowered plasma arc torch, a pile of sheared iron plates, and a scattered array of copper fittings, seals, and pressure gauges.

"That bench has a broken feed-line assembly from a secondary water condenser," Vane said. "You have six minutes to diagnose the pressure failure, assemble a functional bypass loop using those fittings, and strike an airtight seam on the main flange. If the seal leaks under fifty atmospheres of static pressure, you fail. If you burn through the plate, you fail. Go."

Kort blinked, a sudden flash of panic washing over his features. "Wait—without a diagnostic reader? We don't get a telemetry scan of the failure point?"

"The comet doesn't give you telemetry scans when it’s throwing fifty-ton ice boulders through your primary engine housing," Vane said coldly. "Your time started five seconds ago."

Kort scrambled toward the bench, his polished boots sliding on the iron floor plates. His hands fumbled with the tools, picking up a diagnostic slate that wasn't connected to anything, his face growing redder by the second.

Vane ignored him and turned his gaze down the line. His eyes landed squarely on Lars.

"You," Vane said, stepping closer. Up close, the old master mechanic smelled of heavy fuel oil, stale tobacco, and cold iron. "You're from Bay 9. I recognize the soot on your knuckles. Vance's crew."

"Yes, sir," Lars said, holding his chin steady. "Lars Thorne."

"Vance is an idiot who over-tightens his flange bolts because he doesn't trust his gaskets," Vane said bluntly. "Did he teach you to do that?"

"No, sir," Lars said. "Old Miller taught me. He said if you have to force a bolt past its torque limit, you used the wrong gasket or you don't know how to clean a flange face."

A faint, almost imperceptible twitch passed through Vane’s gray beard. It might have been a smile, or it might have been an itch.

"Miller, huh?" Vane grunted. "That old turnip still using that brass optic?"

"Yes, sir. Clicks every time he looks at something dirty."

Vane turned and walked toward the second test bench in the center of the room. This one was far worse than Kort’s. Suspended from an overhead hoist was a heavily damaged pneumatic actuator cylinder—the kind used to drive the broad mechanical jaws of a Harvester’s primary ice-clamp. The steel sleeve was split near the base, its piston jammed at a cocked, unnatural angle, and the high-pressure fluid lines were clogged with caked, frozen rust and grit.

"This came off the Aethelgard's port grapple three hours ago," Vane said, tapping the split sleeve with a iron-headed mallet. "The piston is jammed solid. The valve block is air-locked. And you’ve got four minutes to clear the jam, align the rod, and drop a clean torch seam along that split sleeve so we can pressurize it to clear the line."

Lars looked at the damaged cylinder. It was heavy, brutal work.

"The sleeve is split because the piston rod is bent," Lars said, stepping up to the bench without waiting for an order. "If I just weld the split now, the heat will warp the cylinder body even further and seize the rod permanently."

Garra stepped forward, her brow furrowing. "Did he ask for an opinion, kid?"

Vane raised a calloused hand, silencing her. He stared at Lars, his single good eye narrowing into a sharp, piercing slit. "Go on."

"I need to heat the rod casing first with a wide-nozzle neutral flame," Lars explained, pulling his heavy leather work gloves from his belt and pulling them on. "Expand the outer housing to relieve the binding pressure on the piston. Then I use the lead mallet to knock the rod true, clear the valve bypass to drop the internal pressure, and then run the arc down the seam while the metal’s still warm."

Vane folded his arms across his chest. He didn't check a timer. He didn't look at a slate.

"The torch is on your right," Vane said softly. "Prove it."

Lars didn't hesitate. He grabbed the heavy torch, hooked the air-fuel lines into the quick-disconnect manifold on the bench, and struck the flint. Clack-clack-crack.

The blue flame erupted with a fierce, hot roar. Lars adjusted the gas ring with his thumb, paring the flame down until it had a sharp, blue inner cone surrounded by a soft outer halo.

He didn't rush. He knew that haste with thick iron meant uneven expansion, and uneven expansion meant cracked metal. He swept the flame in wide, steady figure-eights across the base of the split sleeve. The dull, pitted gray steel began to change color—darkening, then blushing into a faint plum-purple, and finally glowing a deep, crimson orange.

"He's taking too long," one of the tech-cadets whispered from the background. "His four minutes are almost up."

Lars ignored him. He felt the heat radiating through his leather gloves, smelling the bitter stench of burning oil as the dried grease inside the cylinder vaporized.

He dropped the torch into its bench hook, snatched up the heavy brass lead-mallet, and struck the head of the jammed piston rod.

CLANG!

The sharp metallic blow echoed off the high vault ceilings. The piston didn't move.

Lars didn't strike it again immediately. He picked up his brass rule, measured the offset angle at the base of the flange, shifted his stance by three inches, and struck the rod again—this time at a precise fifteen-degree off-axis angle.

BANG!

With a deep, wet shuck, the jammed piston slid free, dropping three inches back into its cylinder body as the thermal tension released. The air-lock valve hissed loudly, venting a cloud of hot, aerosolized hydraulic oil into the room.

Without missing a beat, Lars seized the arc welding wand, flipped his heavy tinted goggles down over his eyes, and struck the electrode against the glowing steel seam.

ZZZZZZZT!

A blinding, brilliant arc of white-blue light burst into existence. The harsh, ultraviolet glare filled the dark testing vault, casting long, jumping shadows against the iron bulkheads.

Lars moved his hand with rhythmic, practiced precision. He didn't weave the arc too wide; he held the tip tight to the root of the fracture, laying down a dense, overlapping chain of liquid metal teardrops. Puddle, step, puddle, step. The smell of ozone and burning flux filled his nostrils, thick and sharp. He could feel the intense radiant heat baking the skin of his face beneath his goggles, but his hand stayed absolute, stone-steady.

He finished the run at the bottom flange, popped the electrode back from the metal, and killed the circuit.

The brilliant glare died instantly.

The weld glowed a bright, incandescent cherry-red in the relative darkness of the bay, a perfect, uniform weave of iron joining the split edges together like a sewn seam.

Lars pulled his goggles up onto his forehead. He picked up a wire brush and vigorously scrubbed the hot slag off the bead, revealing a smooth, bright silver track beneath.

Silence hung in the testing room, save for the crackling sound of the cooling metal and the distant, frantic banging of Kort at the other end of the chamber, who was currently drowning his bench in unpressurized hydraulic fluid.

Vane stepped up to the bench. He didn't say a word. He reached out with a bare, calloused thumb—ignoring the searing residual heat—and pressed it directly against the cooling weld metal. He dragged his thumb down the entire length of the seam, feeling for air pockets, pinholes, or cold-shunts.

He pulled his thumb back. A light smearing of black carbon was the only mark left on his skin.

"The bead is a quarter-millimeter off-center at the tail," Vane said, his voice flat.

Lars wiped a bead of sweat from his nose with the back of his sleeve. "The thermal drag from the split sleeve pulled the puddle slightly left when the alloy cooled, sir. If I had another ten seconds to pre-heat the lower flange, it would have stayed straight."

Vane looked at Lars. His single squinting eye seemed to read every line on Lars's face, every greasy smudge, every scar on his knuckles.

"Garra," Vane called out, not taking his eyes off Lars.

"Yeah, Boss?"

"Get this kid’s transfer paperwork from Bay 9. Tell Vance if he complains, he can take it up with the station director, or he can come down here and explain to me why he’s keeping real mechanics tucked away on scrap duty."

Garra grinned, her scarred arm folding across her chest. "Got it."

Vane turned his back on Lars, stepping toward the next nervous line of candidates waiting by the doorway.

"Pack your kit, Thorne," Vane grunted over his shoulder. "Berth 404 on the Aethelgard. Shift starts at zero-four-hundred hours tomorrow. If you’re one minute late, I leave you on the dock."

Lars stood by the bench for a moment, the heavy lead mallet still balanced in his hand. His chest felt light, his heart pounding against his ribs like a high-pressure piston. He looked at the perfect, glowing seam of welded iron on the heavy actuator, then down at his soot-blackened hands.

He wasn't going to be cutting up scrap anymore.

He looked back out toward the bay exit, where the distant, massive hull of the Aethelgard rested in the dark slip, waiting for the ice.