A fortified gate was not merely a door with an iron bolt. It was a three-space-folding spatial funnel designed to turn an attacking vanguard into an isolated sharp-angled math.
At first light, Giles Croft stood beneath the vaulted stone ceiling of the new gatehouse entry hall.
The chamber was thirty feet long, twelve feet wide. Then he roofed with an eighteen-inch-thick vault of volcanic cement concrete. Through the outer archway lay the concrete barrel arch bridge and the newly flooded moat. Through the inner archway lay the Cardo Maximus and the orderly streets of Grey Crag.
Above his head, set into the concrete ceiling in two parallel rows, yawned six box-shaped slots.
Each slot was six inches wide and three feet long, edged with dressed granite curbs and lined with smooth high-pressure mortar.
“Murder holes,” Captain Kenneth Drake murmured. He stood beside Giles and looking straight up through the openings into the upper guard chamber. “The Dun-Krag citadels had them. We dropped burning animal fat, burning lime powder, and pig-iron bars through the slots when the vanguard broke the outer gate.”
“I prefer to classify them as upright gravity-helped dispatch chutes,” Giles said, checking the dimensions with his brass measuring tongs. “A six-inch sky-slit restricts return fire from below, as an arrow fired upward at an eighty-five-degree angle loses ninety percent of its striking force to gravity. Conversely, an object dropped from the upper narrow high walkway accelerates at 32.2 feet per second squared, maximizing impact energy at ground level.”
Kenneth chuckled grimly. “Dispatch chutes. The raiders will call them the teeth of hell.”
Master Duncan Stone-Splitter and Master Caleb Thorne-Wood stood on the overhead floor of the outer gatehouse. He looked down through the six slots at Giles.
“Molds are stripped clean, Lord Giles!” Caleb shouted down through slot number three. “The volcanic cement concrete cured hard as flint. Not a single crack around the iron framing collars.”
“The radius corners are rounded to three inches,” Duncan added. He leaned over the sky-slit with his dressing scutch. “If a heavy granite block drops through, the concrete curb won’t chip or spall under impact. The edges are dressed like the lip of a well.”
“Good,” Giles called back. “Now check the drop-gate track posture.”
At either end of the thirty-foot stone tunnel hung two massive portcullises.
They weren’t light timber grates. Each drop-gate was eight inches thick, built of seasoned white oak timbers sandwiched between heavy iron plates, joined by one-inch wrought-iron rivets.
The bottom tips were shod with four-inch solid steel spikes, hardened in salt water by Borin Bronze-Lung.
Each drop-gate was suspended from heavy iron chains running over overhead bronze pulleys to a counterweighted trip-pin in the upper guardroom.
Master Borin stepped onto the upper platform. He tapped the bronze mid-air pulley wheels with an iron wrench.
“Glowing-bronze pulley wheels, turned true on the lathe,” Borin reported. “Chains are forged from three-quarter-inch mountain iron. Trip-pins tested and greased with mutton lard. Pull the safety lever, and six thousand pounds of hardwood drops thirty feet in zero point eight seconds. A charging warhorse would be snapped in two.”
“We don’t drop the inner gate first,” Giles reminded Kenneth. “The working set is deliberate. If the enemy breaches the outer barrier, we allow their high-value shock vanguard to enter the entry hall. Then we drop the outer drop-gate behind them.”
Kenneth nodded, his eyes glowing with tactical appreciation. “Trapping them in a stone box. Thirty feet of granite walls, no retreat, and six murder holes directly above their helmets.”
“Trapping them inside an enclosed volume of four thousand three hundred cubic feet,” Giles said with exact satisfaction. “Where their numerical advantage is reduced to zero and their lateral scattering is constrained to twelve feet.”
Sister Teresa walked the upper gallery above the slots. She carried an armload of heavy clay pot jars.
Each jar was filled with dry slaked burning lime powder and fine quartz sand.
“We have prepared twelve vessels of cleansing dust,” Teresa told Kenneth. She set a jar beside slot number one. “When the wicked enter the dark passage, we shall pour the dust upon their visors. It seeks the moisture of their eyes and burns away their pride.”
“Burning lime powder reacts exothermically with water to produce calcium hydroxide and intense heat,” Giles noted. “It induces immediate temporary blindness and severe breathing spasms. It’s a highly effective non-lethal crowd crushing weight agent.”
“It’s the wrath of heaven in an earthen pot,” Teresa replied serenely.
Toby Karr and two apprentices were stacking heavy granite blocks along the upper wall.
Each block was dressed into a twenty-pound cube, smoothed on four sides, designed to fit cleanly through the six-inch ceiling slots.
“Twenty-four stone drops ready on the north gallery, Lord Giles!” Toby called down. “And Master Borin has two cooking pots of sulfur pitch ready in the forge shed!”
“No boiling pitch inside the entry hall,” Giles commanded, his voice firm. “Burning in an enclosed stone vault consumes oxygen within ninety seconds, creating carbon monoxide hazards for our own defenders on the gallery above. Stick to moving stone drops and burning lime powder canisters.”
Kenneth smiled faintly. “Always thinking of the air, my lord.”
“Air quality is a deepest heavy-duty safety requirement, Kenneth. A dead defender can’t operate a drop-gate lever.”
By mid-afternoon, the outer gatehouse was fully working.
The heavy double gates of hardwood stood braced in their stone grooves. The six upright murder holes yawned silently in the concrete ceiling. Along the flanking walls, ten arrow embrasures provided crisscrossing lines of fire across the inside floor.
Giles walked the length of the raised stone road, inspecting the outer gate approach.
The concrete barrel arch bridge spanned the twenty-foot moat cleanly. On either side, the twelve-foot-deep water lapped against the upright concrete scarp.
Between the moat, the bridge, the outer gatehouse, and the twin springald towers, Grey Crag had become an impregnable nested castle.
Kenneth leaned against the stone low roof wall, looking out over the quiet valley.
“Bronn won’t breach this,” Kenneth said quietly. “He could bring a thousand axes, and they would die in the ditch.”
“An building system is only as strong as its weakest component,” Giles said, checking his pocket watch. “Our water is secure, our bridge is solid, and our choke points are tuned. But our iron stores are nearly empty. Borin burned up our last ten bars of mountain iron on the drop-gate shoes.”
Lady Millicent walked up the raised stone road, her glasses catching the afternoon sun.
“We have three hundred and sixty-five citizens to feed, eighty gold sovereigns in the treasury, and zero reserve iron for the springald bolts,” Millicent said. He tapped her ledger. “If this siege lasts more than two weeks, we’ll be forging plowshares into arrowheads.”
“We need a commercial infusion,” Giles agreed. “Trade goods for heavy-duty raw materials.”
Before Millicent could reply, a high brass horn sounded from the southern forest road.
It wasn’t the harsh, crude war-horn of the Broken Horn bandits.
It was a melodic, three-tone brass fanfare—flamboyant, civil, and undeniably wealthy.
Giles raised his pocket telescope.
Rattling across the newly completed southern bypass road came an amazing, six-wheeled carriage painted in brilliant lacquered turquoise and trimmed with gold-trimmed bronze leaf.
The vehicle was pulled by four sleek gray horses with braided manes and polished silver harnesses.
Flanking the carriage rode eight skilled guards in polished steel breastplates and blue velvet tabards. They carried gold-trimmed axe-spears and short carbine-crossbows.
The carriage rolled smoothly across the new concrete barrel arch bridge, its iron-rimmed wheels ringing cleanly against the volcanic cement stone floor without a single rut or bounce.
“No toll gate,” Kenneth noted, watching the carriage cross the bridge. “They just bypassed Baron Cedric’s entire defile.”
The turquoise carriage halted in the center of the Cardo Maximus, right before the outer gatehouse gate.
A footman in powdered hair leaped down from the rear footboard, unfolded an iron step-ladder. Then he opened the carriage door with a flourish.
Out stepped a man of medium height, dressed in an amazing velvet doublet the color of rich wine, lined with white ermine fur. Around his neck hung three heavy gold chains bearing the stamped medallion of the Great Western Trade ring.
He held a gold-headed walking stick and a scented linen handkerchief. It he pressed delicately to his nose. He stepped onto the raised stone road.
He tapped the stone floor with his gold-headed stick, listening to the solid, ringing tone of the concrete.
“Smooth,” the merchant muttered to himself. “Not a single rut. Not a drop of grease on the hub-caps. And zero transit tolls.”
Giles dropped the stone steps to the raised stone road, his measuring tongs in hand.
He approached the carriage’s front axle, knelt briefly. Then he measured the distance between the bronze hub-bands.
“Sixty-four inches,” Giles noted, standing back up. “Standard royal freight track. You were paying double penalty tolls at Baron Cedric’s checkpoint, were you not?”
Raymond Barlow’s face lit with passionate grievance.
“Four hundred gold sovereigns every quarter!” Barlow cried, tapping his cane against the stone floor. “Cedric’s thugs would hold my wagons for three days in the mud while their court guards forced our wheels through a twisted hoop of battered lead. He claimed my axles were illegal road-breakers!”
“His hoop was three inches narrower than royal statute,” Giles told him. “We impounded the gauge yesterday and established an allodial crown transit easement. This bypass is open to all commercial transport.”
Barlow stared at Giles with renewed wonder, his ermine-lined shoulders relaxing.
“You broke Cedric’s monopoly with a royal transit code?” Barlow laughed, shaking his head. “Lord Croft, the merchants of the High Marches have been trying to break that robber-baron for thirty years. You did it with a pair of measuring tongs and a bridge.”
He turned toward the settlement. He stared at the twenty-foot water moat, the soaring forty-arch stone aqueduct, the twin springald castle walls. The massive concrete outer gatehouse with eyes that threatened to pop from his head.
“Sweet Fortune and the Golden Scales,” the merchant breathed. His mouth dropped open in sheer commercial awe. “A Roman highway, a raised aqueduct. A double-vaulted outer gatehouse in the middle of the penal scrub.”
He turned to his lead guard, his walking stick trembling in his fingers.
“They told me the Crane barony had exiled him to starve in a peat ditch,” the merchant whispered. “They said he was playing with mud bricks.”
He looked up at the stone gatehouse. There, Giles stood in his dark wool coat with his brass slide rule in his hand.
The merchant tucked his scented handkerchief into his velvet sleeve, bowed from the waist with dramatic elegance. Then he flourished his feathered hat.
“Greetings, Lord Croft!” the merchant called in a rich, booming deep. “I’m Guildmaster Raymond Barlow of the High Marches Merchant Trade ring! And I believe you and I have a great deal of business to discuss!”