The Secondary Housing

Riosbh stood trembling in the middle of the deck, his chest heaving under his clean, regulation tunic. He looked at the pressure gauge on the wall. The needle dropped another two kilopascals with a dry, scraping wheeze from the intake fan. The sour stench of decaying synthetic filter was beginning to curl over the edge of the console, sharp as battery acid.

Without another word, Riosbh turned to the wall, pulled down the heavy steel torque wrench, and dragged his boots across the deck to the secondary housing.

"Good," Colmhaign said. "Loosen the outer retaining collar first. Do not touch the inner seal until I have the thermal jacket in place, or the back-pressure will blow the hot sludge straight into your face."

Colmhaign triggered the pneumatic cutter. The hardened teeth bit into the high-gain transmitter's primary coolant feed with a shrieking bite of metal. Bright, clear glycol splashed across the deck, smelling of bitter alcohol, followed by the heavy thud of the copper heating coils pulling away from the transmitter's fried vacuum tubes. With swift, practiced motions, Colmhaign stripped the thick insulation jacket from the power bus, exposing heavy ribbons of pure copper and flexible high-temperature ceramic sleeves.

He carried the coils to the workbench. Using the pneumatic clamp, he crushed the raw calcified resin block into irregular, fist-sized chunks, feeding them into a salvaged cylindrical steel pipe that had once served as a high-pressure hydraulic accumulator. He wrapped the copper ribbons tightly around the outside of the steel cylinder, winding them in a dense, overlapping spiral that would transfer maximum resistive heat into the chamber.

"Collar is loose," Riosbh called out from the scrubber unit. Sweat was dripping off his chin, pooling on the collar of his shirt. "The flange is vibrating. The bolts are binding from the heat—I can't turn the last three by hand."

"Stand clear," Colmhaign said. He hauled the heavy accumulator assembly over his shoulder, the thirty-kilogram mass of steel and stone digging hard into his collarbone.

He climbed the short ladder to the scrubber platform. The air up near the ceiling was thick, hot, and smelled of scorched plastic. The primary intake manifold was bucking in its mounts, the heavy iron brackets groaning as the external atmospheric surge slammed against the exterior intake louvers twenty meters above on the station's outer skin.

Colmhaign slotted his heavy wrench onto the stuck flange bolt. He planted his boots against the support frame, leaned his full body weight into the lever, and hauled back. The bolt screamed in its threads, rusted fast by moisture, then gave way with a sharp crack that rattled Colmhaign's teeth. He spun the remaining nuts off with his bare, gloved fingers, letting them drop to the deck below.

"Hold the bypass line," Colmhaign commanded. "Keep it level with the intake port."

Riosbh grabbed the heavy rubberized conduit with both hands, his arms shaking from the strain. "It's pulling! The vacuum is trying to swallow the hose!"

"Don't fight the vacuum," Colmhaign grunted, lifting the modified accumulator cylinder and lining up its machined mouth with the exposed intake throat of the scrubber. "Guide it into the opening. Let the suction seat the gasket."

The raw draft from the intake hit them like a blow to the chest. It was cold, wet, and heavy with the sharp, metallic tang of the rising Breath-Tide. Colmhaign felt the tiny, invisible spores brushing against the exposed skin of his neck—a prickling, itchy sensation like powdered glass. If they took more than twenty seconds to seal the port, the spores would coat the inside of their throats and begin their silent, calcifying work in the warm moisture of their lungs.

Colmhaign jammed the cylinder home. The metal mouth slammed against the scrubber housing with a violent clang.

"Now!" Colmhaign shouted. "Clamp the lower bracket!"

Riosbh threw his weight onto the toggle clamp, snapping the steel lever down. The rubber gasket compressed, but a high-pitched, shrieking hiss erupted from the top seam. The pressure differential was too high; the improvised seal was lifting at the corner where the old flange was warped from years of mechanical neglect.

"It won't hold!" Riosbh yelled over the deafening whistle of escaping air. "The gap is three millimeters! We don't have another gasket!"

Colmhaign scanned the platform. There was no clean rubber within reach, no scrap silicone, no high-pressure putty.

His eyes fell on the laminated corporate manual Riosbh had dropped onto the lower deck.

"Throw me the manual," Colmhaign said.

"What?"

"The binder! Give it to me!"

Riosbh scrambled down the two steps, scooped up the heavy, four-hundred-page operations manual, and hurled it up to the platform.

Colmhaign caught it with his left hand. With a single, vicious wrench of his forearms, he ripped the heavy synthetic binder off its metal rings, tore the dense, fiber-reinforced cover into three neat strips, and jammed them directly into the whistling gap beneath the flange.

The fibrous plastic groaned under the mounting heat, softened slightly, and molded itself into the irregular contours of the warped metal.

"Torque down the retaining bolts," Colmhaign ordered. "Cross-pattern. Two turns each."

Riosbh seized the wrench. Working in frantic rhythm with Colmhaign, he tightened the upper right bolt, then the lower left, forcing the steel plates together until the synthetic cover was compressed into a solid, airtight wedge.

The shrieking hiss died down to a low, muffled rumble.

"Power to the heating coils," Colmhaign said, dropping down to the deck and grabbing the heavy jumper cables he had spliced into the station's main twelve-hundred-volt distribution bus. "Brace yourself."

He touched the heavy copper lugs together.

A blinding blue arc flared across the bay, casting harsh, stark shadows against the corrugated walls. The smell of ozone instantly overpowered the stench of vinegar and glycol. The copper ribbons wound around the accumulator cylinder glowed dull cherry red, then bright orange.

Inside the steel pipe, the cold chunks of native resin cracked and groaned as thermal expansion took hold. The high-density lipid binders melted, opening millions of microscopic channels through the calcified mineral lattice.

Above them, the station's intake turbine gave a ragged, shuddering wheeze as the air dragged through the dense, hot stone. For five agonizing seconds, the turbine RPM dropped into the red zone, the motor whining in protest against the immense drag.

Then, with a deep, hydraulic thud that shuddered through the floorplates, the pressure equalized.

The needle on the primary intake manometer kicked violently, jumped past the warning mark, and settled firmly at ninety-four kilopascals.

Colmhaign stood motionless, his hand still resting on the heavy knife-switch of the power jumper, watching the dials.

The airflow monitor ticked steadily upward: three hundred liters per minute, then three hundred and eighty, then four hundred and twenty. The air coming out of the overhead distribution vents lost its bitter chemical sharpness. It was cool, dense, and smelled faintly of wet limestone and crushed river shells—the distinctive, alkaline scent of filtered native atmosphere.

Riosbh collapsed backward onto an empty resin crate, his legs completely giving out. He dropped the torque wrench onto the deck plates with a hollow clatter and buried his face in his grease-blackened palms.

"It worked," Riosbh said, his voice muffled against his hands, shaking with a mixture of disbelief and utter exhaustion. "The intake is holding."

"It's holding," Colmhaign agreed. He pulled an oily rag from his pocket and wiped the black grease and sweat from his forehead. "The calcified resin will saturate with spore mass in about twelve hours. When the pressure drop rises above twenty kilopascals again, we will have to pull that cylinder, bake it in the furnace to burn out the biological load, and reload it with fresh rock."

"Twelve hours," Riosbh breathed, looking up toward the ceiling with wide, hollow eyes. "We bought twelve hours."

"Twelve hours is enough time to live," Colmhaign said. "Twelve hours is enough time to find more resin."

Before Riosbh could respond, a sudden, sharp crack echoed from the mezzanine.

Colmhaign turned instantly. Across the room, inside the stripped communications cabinet, the high-voltage step-up transformer, deprived of its cooling loop and overwhelmed by the massive inductive back-surge from the life-support bus, gave a violent flash of purple light. A shower of molten copper beads rained down against the wire mesh. The cooling fluid remaining in the lower sump ignited in a brief, smoky puff of blue flame, then died out completely.

The row of glowing green status indicators on the long-range transmitter flickered twice, turned amber, and went totally dark.

Riosbh watched the dead console in silence. He did not yell. He did not quote the manual. The loss of their link to the stars had ceased to be a regulatory violation; it was simply a cold, unalterable physical fact written in scorched copper.

"We are really on our own," Riosbh said quietly.

"We were on our own the moment the last shuttle fired its thrusters," Colmhaign said, stepping over the puddle of spent glycol and retrieving his tools from the bench. "The radio was just a comforting noise to keep you from noticing how empty the sky is."

He bent down to pick up his wrench, but before his fingers could close around the steel shaft, a deep, heavy vibration rolled through the station's foundation.

It was not the rhythmic pulsing of the intake turbine, nor was it the wind of the Breath-Tide battering the exterior superstructure. It was a low, grinding shudder that traveled straight up through the thick bedrock beneath their feet.

From deep below the maintenance deck, down in the unheated, unpressurized depths of sublevel one where the primary drainage channels met the station's lower foundation, came a sickening, metallic crunch—the unmistakable sound of a heavy hydraulic seal shearing under catastrophic external pressure.

Colmhaign straightened slowly, his eyes fixing on the sealed hatchway that led down into the dark.

"What was that?" Riosbh whispered, freezing on his crate.

"The lower locks," Colmhaign said, checking the battery pack on his heavy work lantern and clicking it into his belt. "The tide found a way into the basement."