The morning mist rising off the valley stayed in sodden clumps. It smelled of wet spruce, decomposing peat, and the rank stench of boiled wolf fat. Rustgate Outpost had survived the winter frost raid. But survival was merely a temporary office state.
Giles Croft stood on the northern terrace, greatcoat buttoned tight against the damp chill. He watched four laborers drag a rotten hemlock log through the mire. The log slipped from their hemp slings, squelching two feet deep into the muck.
Giles clicked his tongue and adjusted the brass focus ring on his twenty-four-inch brass surveying scope.
“Look at that material degradation,” Giles muttered, sighting through the aiming cross at the sagging eastern wooden wall. “Spruce sapwood has a stuffy service life of three years in bog peat. It absorbs groundwater like a sponge, rots from the pith, and has zero heat mass. If an unmodded player builds a two-story barracks on green spruce, the upper floor shears off in the spring thaw. We’re migrating to stone today.”
Beside him, Toby Karr shivered inside a giant wool tunic, clutching a red-and-white land-mapper’s rod. The apprentice breathed shallowly to keep his teeth from rattling against the brass bezel of his dual-spool chalk-reel.
“S-stone, Lord Baron?” Toby stammered. “River cobbles?”
“River cobbles are rounded by river-bed friction, Toby. Zero clockwork interlock, huge void ratios. They eat twice as much lime mortar to resist sideways tearing force,” Giles said in the flat voice of a senior civil checker rejecting an unpermitted foundation. “Cobbles are for decorative garden paths. We need massive stone, high-crushing igneous rock. Pack the transit case. We’re climbing the ridge bluffs.”
Heavy boots squelched behind them as Captain Kenneth Drake marched up the terrace. The scarred frontier marshal gripped his ten-foot iron-shod trench-measuring rod, sallet helmet pushed back to reveal claw-scratches along his temple.
“The men are restless, Lord Giles,” Kenneth grunted, his breath pluming white. “They held the wooden wall with boiling lye and your lime water gates. They expect an extra ration of salted mutton. Instead, you have them loading iron drills onto handcarts.”
“Victory feasts don’t prevent foundation subsidence, Captain,” Giles replied without looking up from his level vial. “The frost raid proved our defensive envelope is porous. If a Tier-2 siege unit strikes that gate, timber folds like wet cardboard. We’re opening a quarry on the granite bluffs two miles upstream.”
Kenneth’s mustache twitched. “The Grey Crag bluffs? Lord Giles... Those cliffs belong to the Stone-Eaters. Old Duncan and his dwarven outcasts have held the scree caves since the Founding Age. They don’t take kindly to lowlanders scratching at their rock.”
“Nobody is scratching at their rock,” Giles said, shouldering the dark wood instrument case. “We’re extracting sixteen-inch space-folding cut stone. If they understand cleavage planes, they can take a wage. If they don’t, they can stay clear of the swing radius.”
***
The trek up the gorge was two miles of steady height gain. Gray peat gave way to dark stone shelves, crowned at the three-hundred-foot line by a sheer wall of pale gray rock rising into the clouds.
Giles stood at the base. He ran his eyes along the rock face with the hungry care of a digging builder spotting unworked bedrock. It was a massive plutonic intrusion of coarse-grained biotite granite, scoured clean by ancient glaciers into upright faces.
“Look at those jointing patterns,” Giles murmured. He pulled a pocket magnifying glass and a folding wooden ruler from his coat. “Sub-level sheeting joints spaced at four-foot intervals. Upright relief fractures at sixty degrees. Quartz content thirty percent, pink potassium pink rock, negligible pyrite rusting. This is load-bearing building material.”
A low, grating cough echoed from behind a mossy boulder twenty paces away.
“Keep your soft lowland fingers off the mountain’s rib, boy,” a voice rumbled like boulders grinding in an iron mortar.
From behind the talus stepped Master Duncan Stone-Splitter. Barely four feet tall but built like an oak beer cask, the dwarf wore greased leather heavy with hammered iron scales. Over his eyes sat thick wire-mesh goggles. In his right hand, he balanced a sixteen-pound steel-faced dressing hammer. Six dwarven quarry hands leaned on iron pry-bars behind him.
“You’re trespassing on the old family scree of the Stone-Eaters,” Duncan growled, leveling the hammer toward Giles. “Every summer, some scented nobleman rides up here waving sheepskin, ordering us to carve palace stairs. And every winter, the mountain crushes his sledges and freezes his men. The mountain gives stone only to blood and iron.”
Giles didn’t flinch. After fifteen years managing work subcontractors, an angry dwarf with a mallet barely registered.
“Your strike face is misaligned by four degrees, Master Duncan,” Giles said mildly.
Duncan froze. His bushy gray eyebrows bristled behind the wire mesh. “What did you say, surface-tick?”
“Your quarry face is an ergonomic and load-bearing disaster,” Giles repeated. He pointed toward a blackened indentation fifty feet away where cracked rock lay in heaps. “You’ve been firesetting. Building timber bonfires against the face and cooling it with cold river water.”
Duncan puffed out his chest. “The sacred craft of the Hearth-Kings! We heat the stone until it weeps, then douse it with ice! The rock bursts like thunder!”
“And every cubic foot you produce is riddled with tiny heat shock fractures,” Giles said. He tapped the rock with his brass-bound rule. “Differential spreading between quartz and pink rock causes intergranular cracking under a sudden seven-hundred-degree slope. You burn cords of seasoned firewood to produce fractured rubble under four thousand pounds of pressure crushing strength. You can’t dress a cut stone block from that debris without it shearing along an internal stress plane. It’s an eighty percent material waste rate.”
Duncan’s jaw went slack. The quarry hands behind him glanced at each other, their grip on their pry-bars loosening.
“How... How do you know the blocks crack during dressing?” Duncan whispered, his belligerence faltering. “Did Borin send word from the forge?”
A booming bellow echoed from the trail below.
“I didn’t have to send word, you thick-skulled mole!”
Master Borin Bronze-Lung trudged up the slope, leather apron flapping against his calves. In his left hand he carried an oak tool chest. In his right, he cradled his prized Dual-Sky-slit Brass Light-beam Disappearing-Filament Pyrometer, brass housing gleaming in the gray daylight.
“Borin?” Duncan gasped. “You left the royal forge to haul boxes for a lowland lordling?”
“I left because this lordling actually understands heat-powered heat exchange!” Borin snorted, stepping between them. “Look at this fire gauge! Borin forged the casing, but Lord Giles calculated the color-heat index to the single degree! While you’ve been scorching rock like a cave-goblin, we’ve been casting lances that punch through ice-drakes!”
Borin unlatched the chest, presenting the contents to Giles with deep respect. Inside lay three dozen forged carbon-steel components in oiled burlap. Twenty slender, narrowed steel center wedges and forty curved, half-round steel thin wedges—the classical plugs and feathers.
“Forged from spring-steel stock, Lord Giles,” Borin declared. “Cooled in salt water and hardened to straw-yellow at four hundred and thirty degrees. Zero brittleness, maximum surface shear.”
Duncan squinted at the metal, nose wrinkling. “What’s that toy iron? You think you can crack a granite cliff with needles? You need a sixty-pound drop-ram and two teams of oxen!”
“Massive moving impact creates chaotic propagation,” Giles replied, selecting three sets of feathers. “We don’t need moving brutality. We need uniform pulling hoop stress.”
He turned to the cliff, locating a natural level rift plane intersected by a clean upright cleavage joint.
“Toby. Bring the star-drill and mallet.”
Toby sprinted forward with a thirty-inch hardened steel star chisel.
“Mark six-inch intervals along this rift line,” Giles commanded. “Depth: four inches. Keep boreholes straight-across to the face within two degrees.”
Duncan and his crew watched as Toby and two guards drilled a neat row of six holes along the base of a twelve-ton section of cliff.
The holes were blown clean. Then, Giles pushed in two curved steel feathers into each hole, flat backs inward. Then he slid a narrowed steel wedge down the center.
“The feather-and-wedge split operates on simple clockwork advantage,” Giles explained. “The wedge angle is five degrees. Driven downward, lateral spreading against drilled shaft walls multiplies applied force eleven-fold. Lined up along the natural cleavage plane, nearby pulling stress exceeds granite’s pulling limit—barely one-tenth its crushing strength.”
Giles tapped the first wedge lightly with a three-pound hand mallet. Tink.
He stepped to the second. Tink.
Down the line he went. Tink. Tink. Tink. Tink.
Each wedge produced a clear, high-pitched chime. Giles walked back to the start. The tone had deepened, humming with stored elastic tension.
“Listen to the pitch,” Giles told Toby. “When hum sharpens, pushback equalizes across the shear plane. You don’t strike with brute force. You let the wedges talk to each other.”
TONK. TONK. TONK. TONK. TONK. TONK.
Duncan’s wire goggles were inches from the rock. “Nothing is happening. The rock laughs—”
CRAAAACK!
It was a single, ear-splitting whip-crack that sounded like an artillery cannon firing in an enclosed stone hall.
Starting at the first drilled shaft, a razor-straight hairline split ripped across the granite face, following the wedges exactly, then shot upward eight feet along the upright cleavage joint to meet the level sheeting plane.
With a slow, groaning sigh of settling mass, a massive stone block of pale granite—eight feet wide, four feet deep, and four feet high, weighing exactly twelve tons—separated from the mountain. It slid forward two inches on its bed, perfectly box-shaped, edges sharp and flat.
Duncan dropped his sixteen-pound hammer. The dwarf sank to his knees in the rock dust, hands trembling as he touched the split face. It was as smooth as dressed slate, snapped cleanly by sharp-angled law.
“By the bones of the First Mason...” Duncan whispered, voice trembling with religious terror. “You didn’t break it. You commanded the stone to let go. You spoke the Word of Cleavage, and the mountain opened its hand.”
Duncan blinked stinging granite dust from his eyelashes. His calloused hands shook against the cool face of the split stone.
“An Earth-Sovereign walks among the lowlanders, and I cursed him with a blacksmith’s mallet!” Duncan prostrated himself, pressing his forehead against the stone. “Take my hammer, Lord of the Rift! Take my crew! We’re the dust beneath your measuring rod!”
Giles sighed, rubbing his tired eyes.
“Please stand up, Master Duncan,” Giles muttered. “I didn’t speak to the mountain. I applied sixty thousand pounds of lateral wedge pressure to a preexisting deep-rock fault line. If you prostrate yourself in granite dust, you’ll inhale crystal-clear quartz dust, causing silicosis and a permanent twenty-percent lung capacity debuff within five game years. Get off the ground.”
Duncan remained bowed, trembling. “He preserves our lungs with his holy wisdom!”
Kenneth stepped forward, running a gloved hand along the sheer edge with wide eyes. “Lord Giles... A wall built of these stones wouldn’t care about catapults. A battering ram would bounce off like a willow switch.”
“That’s the entire point of Tier-2 civil building, Kenneth,” Giles said, checking his notebook. “Twelve tons down, four hundred to go. Borin, monitor the cooling rate on the next set of wedges with your fire gauge. We have a quarry to run.”
Duncan scrambled up, adjusting his wire goggles with wild zeal. “Lord Master builder! If you desire building material, the granite is only the beginning! Two miles east, near the steaming fumaroles of the Old Fire Pit... The earth weeps a fine, ash-gray powder that smells of ancient thunder. The mountain spirits call it the Blighted Dust!”
Giles paused, pencil hovering over his ledger. His eyes sharpened. “Ash-gray powder? Near active fiery vents?”
“Aye!” Duncan nodded vigorously. “A cursed soil! Nothing grows upon it!”
Giles smiled—a small, terrifyingly satisfied expression that made Kenneth take half a step backward.
“Duncan,” Giles said quietly, “that’s not cursed soil. Pack your sample sacks. We’re going to inspect the best thing that ever happened to civil building.”