The underground foundry beneath Grey Crag smelled of sulfur fumes, glowing charcoal, and hot whale-oil lubricant. In the center of the vaulted stone workshop, twin water-driven trip-hammers beat a rhythmic thud against iron anvils: CLANG... CLANG...
Giles Croft stood before Master Borin Bronze-Lung’s heavy cast-iron turning lathe, an oiled rag in one hand and a brass fine-scale measuring tongs in the other. He wiped cutting grease from the carriage, squinting at six rifled bronze tubes mounted symmetrically around a central hard dark metal-steel drive shaft.
Beside him, Toby Karr sat on an upturned nail keg, threading slender four-inch black glass-steel darts into stamped brass clips riveted to a hundred-round belt of waxed linen.
“Maintain tiny spacing between clips, Toby,” Giles said without looking up. “If the belt links bunch up in the feed chute, the feed pawl will skip a tooth and jam the rotary breech block.”
“Five tiny fractions of an inch, Lord Giles,” Toby answered, checking each link against a notched copper gauge. “Not a hair more, not a hair less.”
Master Borin Bronze-Lung strode over from the tempering trough. He wiped soot-blackened hands on a leather apron. His braided copper beard was tucked into his belt to keep clear of the lathe gears. The dwarf glared at the six-barrel bronze assembly with deep suspicion.
“Lord Giles,” Borin began, voice rumbling like grinding millstones, “for three days my smiths have forged hardened cam tracks, spiral follower grooves, and hardened leaf springs. We machined six rifled bronze barrels true to a thousandth of an inch. But I must ask again: what in the name of the Stone Fathers is this contraption?”
Giles adjusted the brass jaws of his measuring tongs across the outer width of the barrel cluster.
“I explained this yesterday, Borin,” Giles said with the patience of an operations manager repeating safety guidelines. “Our granite dressing throughput is fully unacceptable. To finish the stone retaining wall before winter, we need twelve thousand square yards of dressed cut stone. Your stonecutters are hacking at boulders with mallets and broad scutches like cavemen. It’s an excruciating bottleneck.”
Borin blinked, brow knotting. “And this... Dresses granite?”
“It’s a self-running aggregate chipping and surface-dressing tool,” Giles explained, pointing with his measuring tongs. “A high-speed back-and-forth rotary chisel cluster. Powered by a hardened clockwork twisting force spring and a high-pressure steam storage tank line. When the worker trips the sear, the internal cam drum rotates, driving six back-and-forth pistons through an opposed helical track. Each barrel loads a black glass-tipped flechette, locks into battery, discharges at bottom-dead-center, extracts the spent sabot, and ejects.”
Giles gestured toward the six bronze muzzle crowns.
“Muzzle speed: six hundred and twenty meters per second. Cyclic rate: six hundred discharges per minute. Ten micro-impacts every second. When directed at an uncut granite boulder, the packed moving blast waves spall and fracture surface roughness in seconds, leaving a dressed cut stone face without a single mason swinging a sledgehammer.”
Borin stared at Giles, mouth slowly opening beneath his mustache. He looked at the heavy bronze barrels, then at the linen belt of four-inch steel-and-black glass darts, each tipped with a wicked four-sided needle-point arrow point.
“Lord Giles...” Borin whispered in hoarse disbelief. “You’re telling me... That you built a machine that shoots ten armor-piercing iron spikes every single second... To dress building stones?”
“Of course,” Giles said, inspecting the helical follower. “What else would it be for? Weaponizing a self-running stone-dressing tool would be a gross misuse of town capital equipment. Now help me hoist the carriage onto the handcart. We need to conduct a proving test on the low roof wall to calibrate cyclic timing.”
A pale amber window flickered in Giles’s vision, with the crisp typewriter click of an unlocked blueprint.
Giles gave a curt nod. “System recognizes the blueprint designation. Good. Let’s make sure tolerances hold under live operation.”
Twenty minutes later, Giles, Borin, and Toby hauled the seventy-pound weapon up the spiral service stairs to the forward casemate of Bastion Alpha.
The low-profile stone embrasure looked out over the dry ditch and the sloping green turf of the glacis. Mounted atop a cast-bronze pintle tripod, the six-barrel rotary gun sat low behind the granite top door beam. A tube-shaped water jacket wrapped around the barrel cluster, fitted with rubberized copper hoses connected to a ten-gallon cooling tank above the embrasure. Behind the gun, twin wooden spade grips flanked a brass thumb-trigger lever.
Captain Kenneth Drake and Sister Teresa were already waiting in the casemate.
Kenneth stared at the gearwork with narrowed eyes. “What’s this, Lord Giles? A new giant crossbow?”
“An self-running aggregate dresser,” Giles corrected, connecting the feed chute. “Kenneth, look sixty yards downrange. Borin set up our fine-tuning targets.”
Out on the proving flat beyond the ditch, the smiths had erected a five-inch-thick seasoned oak siege mantlet, heavy with tiny hammered iron plates. Behind the mantlet sat a three-ton rough-hewn granite boulder, freshly quarried from the northern cliffs.
“We’ll test penetration and surface flaking off,” Giles said. He turned the bronze winding crank on the right side of the receiver.
CLIK-CLIK-CLIK.
The heavy clockwork mainspring stored twenty-five hundred foot-pounds of clockwork torque. A tiny copper bypass valve hissed as steam from the citadel’s backup line pre-charged the air-powered return piston.
Toby hoisted the wooden ammunition box, feeding the brass starter tab into the feed throat. The internal wheel engaged the first link with a metal snap.
“Feed engaged,” Toby whispered, backing away with hands over his ears.
Sister Teresa stepped forward, dark eyes wide as she gazed upon the six bronze muzzles. She smelled cold machine oil and sulfur propellant paste.
“The Iron Organ of the Seraphim,” Teresa murmured, clutching her war-mattock. “Six pipes to sing the song of unmaking. Speak, Lord Master builder! Let the wrath of the heavens sound across the valley!”
“Sister Teresa, step behind the yellow safety line on the floor,” Giles said calmly. “And don’t look directly at the target without eye protection. High-speed rock chips can cause corneal deep cuts.”
Giles took his position behind the spade grips. He settled his thumbs against the brass firing butterfly. He looked through the rear sky-slit sight. He lined up the front bead with the iron-faced oak mantlet sixty yards away.
“Coolant valve open,” Borin called, turning a brass spigot. Cold water gushed through the jacket.
“Ear protection on,” Giles instructed. He set his feet firmly, took a slow breath, and pressed both thumbs down on the firing lever.
What followed was an earth-shattering clockwork buzzsaw roar that ripped through the casemate with the fury of tearing sheet metal.
BRRRRRRRRRRRRRRRRRRRRRRRRRTTT!
The six bronze barrels spun into a blur of bronze and flame. Ten times every second, the back-and-forth breech block slammed forward, locked, discharged, and pulled out. Spent brass clips and empty linen belt links spewed from the ejection chute in a sparkling arc, clattering against the stone floor in a smoking heap.
Downrange, the seasoned oak mantlet was boiled away.
The packed stream of faster-than-sound flechettes struck the iron plate like an invisible heavy-duty punch press. The metal tore open in ragged holes. The five-inch oak behind it exploded into clouds of airborne sawdust and splinters.
The flechettes passed clean through the timber barricade and slammed into the three-ton granite boulder behind it.
CRACK-CRACK-CRACK!
White sparks erupted across the face of the stone like fireworks. Dense moving blast waves pounded into the rock, shattering its crystal matrix. Huge slabs of granite spalled off the boulder, exploding outward into showers of coarse gravel and stone dust.
After three seconds of nonstop fire, Giles released the thumb trigger.
The barrel cluster spun to a smooth halt with a dry ratchet click. Steam billowed from the water jacket relief valve, hissing sharply into the cold air. The sharp stench of hot oil, friction-heated bronze, and crushed granite dust filled the casemate.
Thirty spent flechette clips lay smoking at Giles’s boots.
Sixty yards downrange, the five-inch oak mantlet had ceased to exist. In its place stood two splintered uprights holding a ragged frame of shredded iron ribbons.
The three-ton granite boulder behind it was split in half, its forward face snapped into a clean, flat plane surrounded by a four-foot heap of crushed road aggregate.
Total silence fell over the casemate.
Kenneth Drake’s ash pacing pole slipped from his numbed fingers, clattering loudly against the flags. The veteran captain stared through the embrasure, jaw hanging open, face pale as bleached linen.
“Gods above and below...” Kenneth whispered, voice trembling with sheer awe. “In three heartbeats... An iron-plated mantlet... Wiped out. A mountain boulder... Shattered like glass.”
He turned slowly toward Giles. “If... If a cavalry squadron charged that ditch... If a thousand knights in full plate galloped into that sector...”
“They would be committing an egregious procedural rule-break,” Giles replied. He took a clean cotton rag to wipe burnt oil from the receiver. “A proving range is strictly zoned for non-organic material testing. Plus, a human body has an extremely low pulling strength compared to load-bearing granite. The slowdown trauma would produce unacceptable bio-hazard contamination across the ditch, requiring extensive sanitary washing.”
Master Borin had fallen to his knees beside the spent brass links. The dwarf picked up a hot flechette clip with trembling tongs. It stared at the care-machined teeth.
“Ten spikes a second...” Borin breathed, jaw slackening as he watched the smoking bronze rotary housing. “A dragon’s throat trapped in clockwork and bronze. Lord Giles... With four of these on the castle walls, no army in the mortal world could ever cross that ditch! You have forged the doom of empires!”
“Borin, I forged a self-running aggregate dresser,” Giles said. He pulled out his brass rule to measure the barrel gap. “And the test revealed two distinct building flaws. Barrel number three has a minor machining burr on the extractor hook, causing slight friction drag. And the coolant tank needs a twenty percent larger pool. The jacket water reached eighty degrees in three seconds. We can’t have heat warping during high-volume aggregate processing.”
Sister Teresa dropped to both knees, forehead pressed against the cold flags behind Giles’s boots.
“The Voice of the Whirlwind!” Teresa announcedin rapturous prayer. “The Divine Master builder has spoken through the Six Mouths of Fire! Let kings tremble, for the threshing floor of the righteous has been built upon Grey Crag!”
Giles let out a slow sigh, rubbing his temple with a chalk-white finger. “Toby, fetch the emery cloth to polish that burr. And bring a bucket of cold water for the pool.”
“Yes, Lord Giles!” Toby scrambled for his tool basket, youthful face flushed with excitement.
Before Toby could reach the door, a wild shout echoed down the stone hall from the low roof wall watchtower.
“Heralds on the road! Royal carriage approaching the North Macadam Avenue!”
Kenneth Drake snatched up his pacing pole and rushed to the watching slit.
Down in the valley, rolling smoothly along the freshly graded crushed-stone avenue, a showy gold-trimmed carriage crossed the outer edge marker, escorted by fifty heavy knights in polished plate armor.
The carriage door swung open. A footman in scarlet livery lowered a folding brass stair.
Stepping out onto the macadam was a frail aristocrat wearing a huge powdered white wig, a stitched purple velvet coat trimmed with gold lace, and pointed red-heeled slippers. In one hand, he carried a gold-tipped ebony cane. In the other, he held an ornate brass steelyard balance beam with dangling balance weights.
“Lord Silas Crane,” Kenneth hissed, recognizing the golden crest on the carriage door. “Chief Clerk of the Royal Board of Trade! The Heavy tax Scythe himself!”
Giles looked through the embrasure, adjusting his glasses. He watched the powdered nobleman sniff a perfumed handkerchief while inspecting the roadbed.
“An clerk arriving during prototype fine-tuning,” Giles murmured dryly. “Let’s hope he brought an approved town transit permit. Secret steel-shod horses on fresh screening aggregate carry a severe roadway degradation penalty.”