The sound of three hundred and sixty-five hungry people eating dry boiled barley was the sound of office failure.
At dawn, Giles Croft stood on the timber levee overlooking the river water chute. In the central yard below, four women and three elderly men were kneeling over stone saddle-querns. They rubbed rough granite hand-stones back and forth across hollowed slabs of rock, their shoulders hunched in tiredness.
A full hour of back-straining labor produced three cups of gritty, gray grain meal.
“Eighteen man-hours per bushel,” Giles murmured, tapping his brass slide rule against his palm. “Hand-milling smooth speed is zero point zero five percent. It’s an unviable heat waste. If our workforce spends forty percent of its daylight hours grinding grain with their wrists, our construction speed will collapse to zero.”
Toby Karr stood beside him, holding a grease horn and a bundle of dried willow shavings.
“The refugee mothers are grinding through the night, Lord Giles,” Toby said softly. “Old Mother Mallow’s knuckles are split to the bone from the granite dust. She says if we don’t get more flour by Saturday, the children will have nothing but boiled pea mash.”
“They will have forty bushels an hour,” Giles said. “Caleb! Bring up the main shaft.”
Master Caleb Thorne-Wood emerged from the timber shed with four joiners, grunting under the weight of a seasoned white oak tree trunk.
The timber was fourteen feet long, sixteen inches in width, and dressed into an eight-sided prism. Each end had been turned round on a pedal lathe and banded with thick wrought-iron hoops forged by Master Borin Bronze-Lung.
“White oak heartwood,” Caleb said, dropping the heavy log onto cedar blocks with a thud. “Air-dried for two seasons behind my shop at Rustgate. You could drop a carriage on it and not split a grain. But Lord Giles... You truly expect the river to turn a stone that weighs more than a warhorse?”
“The river carries striking force proportional to mass and the square of speed,” Giles explained. He opened his wooden ruler. “A river flowing at six feet per second against a four-foot underwater paddle generates over twelve clockwork horsepower. That’s more than enough torque to spin two-thousand-pound millstones at sixty turns a minute.”
Master Duncan Stone-Splitter stepped up, resting his hand on a massive circular slab of gray granite resting on a timber sled.
The stone was four feet in width, twelve inches thick, and weighed just over a ton. Its working face was chiseled with fine, detailed, streaming grooves. Curved feather-and-furrow patterns that looked like an ancient sunburst.
“Dressed the face myself,” Duncan said proudly, stroking the stone. “Granite from the deep quarry seam. Hard as dragon teeth. The furrows sheer the grain like shears, and the lands grind it into dust. But if she spins too fast, she’ll throw fire sparks and burn the meal.”
“Which is why we have a wooden governor and a lantern gear,” Giles said. “Assemble the wheel.”
* * *
The construction of the sixteen-foot undershot waterwheel took eighteen men the better part of three days.
First came the wheel race. Giles had Duncan’s quarrymen line the river water chute with smooth volcanic cement concrete slabs, narrowing the channel from twelve feet to five feet. The constriction increased the water speed by sixty percent. That created a swift, roaring chute of foaming water.
Next came the framing. Caleb’s joiners built two massive wooden spiders. Hubs of white oak fitted with sixteen streaming spokes of seasoned ash. Between the spokes, they pinned wide curved paddles of split cedar, each paddle angled five degrees back to minimize water-flow drag as it exited the water.
In the center of the millhouse, Giles installed the gearing.
There was no cast iron available for large gear rings. Instead, Giles designed a traditional wooden face gear and lantern pinion.
The face gear was seven feet across, mounted directly to the main oak shaft. Around its outer edge, Caleb had driven forty-eight teeth carved from seasoned applewood, each tooth soaked in hot sheep fat.
“Why appletree wood?” Toby asked, sniffing a tooth that smelled faintly of sweet cider.
“Applewood is fine-grained, dense, and naturally self-lubricating when rubbed against hickory,” Giles said. “It wears smoothly without splintering. If an iron tooth jams, the gear shears the shaft. If a wooden tooth jams, it simply snaps a replaceable peg.”
Meshing with the face gear was the lantern pinion. A cage-like metal tube made of two oak discs joined by twelve tube-shaped rungs of hard hickory.
The hickory spindle ran vertically upward through the center of the lower millstone—the bed stone—to lock into the upper runner stone with an iron crossbar known as the rynd.
By noon of the fourth day, the mill was complete.
The timber building stood on stout concrete piers above the river water chute. On the ground floor sat the massive wooden gears, glistening with fresh animal fat. On the raised meal floor above sat the two stone millstones enclosed in an eight-sided pine vat, topped by a narrowed grain hopper and a rattling wooden shoe.
Settlers crowded along the riverbank. Sister Teresa stood on the concrete levee. Her brass slurry lance shone in the noon sun. She watched the dry timber paddles hovering inches above the roaring water chute.
Giles stood on the millhouse narrow high walkway, his hand resting on the iron water gate lever.
“Clear the pit,” Giles commanded. “Toby, prime the hopper with two bushels of red wheat.”
Toby hauled a hemp sack up the ladder and dumped fifty pounds of dry wheat into the wooden hopper. The grain rattled against the slanted wooden shoe.
“Master Duncan, check stone clearance,” Giles said.
Duncan turned a threaded brass shift screw beneath the floor timbers. He lifted the upper runner stone until it hovered exactly one-sixteenth of an inch above the bed stone. He listened with his ear pressed to the casing. “She turns free. Not a whisper of touching stone.”
“Opening the water gate in three... Two... One.”
Giles pulled the iron lever.
* * *
Upstream, the heavy oak water gate lifted six inches.
A torrent of high-pressure river water erupted down the concrete chute, surging beneath the millhouse floor like a roaring white beast.
The water struck the lowest cedar paddle with a resounding SLAP!
The sixteen-foot wheel shuddered. Water sprayed across the mossy wooden support posts. For a second, the massive assembly paused under the dead heavy rush of two tons of oak and stone.
Then, with a deep, groaning rumble that shook through the floorboards, the wheel began to turn.
One spoke rotated. Then two. Then the wheel found its rhythm, spinning with majestic, unstoppable driving force.
Down in the gear pit, the great seven-foot face gear turned. Its applewood teeth met the hickory rungs of the lantern pinion with a smooth, rhythmic crunch: chock-chock.
Up on the meal floor, the massive one-ton runner stone began to spin.
The spinning stone created a suction that drew grain from the hopper. The rattling wooden shoe shook against the revolving spindle. It shook a steady stream of golden wheat berries down into the central eye of the stone.
For ten seconds, there was only the roaring of the water and the deep, bass hum of spinning granite.
Then the discharge spout began to tremble.
Sister Teresa leaned forward, her eyes wide. Old Mother Mallow held out an empty linen flour sack with shaking hands.
From the pine spout poured a solid, creamy-white stream of warm, freshly milled flour.
It didn’t trickle. It gushed. It poured like a soft, powdery waterfall, filling the sack in ten seconds, spilling over the brim and coating Mother Mallow’s clogs in sweet, fragrant white dust.
“Bread...” Mother Mallow gasped, plunging her gnarled hands into the warm meal. “It’s flour! Pure white flour, soft as fleece! No grit, no husks!”
“By the sun and stars,” Caleb shouted, slapping the timber post with his hat. “Listen to those applewood cogs purr! Smooth as cream!”
Sister Teresa dipped her fingers into the warm flour. That let the white dust sift through her hands like holy incense.
“The river itself grinds bread for the faithful,” Teresa proclaimed, turning toward the cheering crowd. “The Lord Master builder has put a harness upon the wild waters. The mountain yields us food without sorrow!”
“It’s thirty-eight horsepower hours per ton of grain,” Giles corrected, checking the flour heat with a pocket heat gauge. “Flour exit heat is ninety-two degrees Fahrenheit. Well below the threshold for gluten denaturation. Volume rate: forty-two bushels per hour. Bottleneck resolved.”
The cheering spread from the millhouse across the river plain.
Refugee women who had spent days weeping over saddle-querns began dancing on the new concrete bridge. Men hauled sacks of grain from the granary on two-wheeled handcarts, lining up along the Cardo Maximus to feed the roaring hopper. By sunset, two tons of clean wheat flour sat stacked in dry cedar bins.
That evening, the settlement smelled of baking bread.
Forty hearths across the eight insulae were burning pine coals, baking flatbreads and round crusty loaves on hot slates. The mood debuff of the camp evaporated, replaced by the warm, drowsy satisfaction of three hundred well-fed colonists.
Giles sat on a bench outside the millhouse, drinking a mug of cold water and reviewing his timber tallies by lantern light.
A light footstep sounded on the wooden walkway planks.
Mistress Pippa the Fermenter stepped into the circle of lantern light. She was a stout, sharp-eyed woman with sleeves rolled to her elbows. She carried a copper testing ladle and a glass hydrometer tube.
Pippa had been the chief brewer and baker of Oakhaven before the outlaws burned the vats.
“Good evening, my Lord Giles,” Pippa said, leaning against the timber rail.
“Good evening, Mistress Pippa,” Giles replied. “The flour grist meets your fermentation criteria?”
“The flour is a miracle, Lord Giles,” Pippa said. She held up her copper ladle. Inside sat half a cup of clear water drawn from the river above the mill. “The flour is perfect. But the water... The water isn’t.”
Giles set his tally-book down. “Explain.”
Pippa swirled the water in the ladle. She held the lantern close to the copper surface.
In the glow of the flame, Giles saw a faint, rainbow-bright oily sheen clinging to the metal. It gave off a sour, swampy smell—faint, but clear.
“The low river water is souring,” Pippa said quietly. “Two miles upstream, the river cuts through the Black Fens. The bog-water is leaching into the main channel. I took a specific gravity reading this afternoon. Tannin levels are up twelve percent. If we brew ale with this, the yeast will die in the vat. If we bake bread with it next month, the loaves will spoil before they cool.”
Giles took the ladle, smelling the water.
His mind right away connected the sour sheen to the black rot spores found in the saboteur’s jar. The shallow river was an open, unsafe channel. A single rotting bog upstream could poison the entire settlement’s drinking supply, brewing vats, and bread-troughs.
“We can’t rely on the low river,” Giles said, his voice flat and deliberate.
“Then where do we get water for three hundred people?” Pippa asked.
Giles stood up and pointed his brass slide rule toward the jagged granite heights of the northern peaks, where pure, snow-fed springs poured over flawless rock shelves two hundred feet above the valley floor.
“We take it from the mountain,” Giles said. “We build a two-mile raised aqueduct across the gorge. Clean water, under nonstop high-pressure head.”
Pippa stared at the towering black cliffs in the moonlight. “An aqueduct? Across the mountain gorge? That would take forty stone arches!”
“Forty-two arches, to be precise,” Giles replied. “And we begin the survey at dawn.”