The floor of the cooperage had been cleared of barrels, and in their place lay fifty square yards of heavy linen drafting cloth pinned to the floorboards with iron horse-shoe nails. Nessa Vale knelt at the center of the vast diagram, her trousers caked with dried mud. She held a long chalk string between her calloused fingers while young apprentice Olla snapped the line to mark the main drainage slope.
Around the outer edge of the room stood fifty men and women from the seven river communities. Draymen, weavers, stonecutters, hospice nurses, and retired canal boatmen. There were no town officials present, no gold-trimmed heralds reading proclamations in legal Latin. The plan spread before them was drawn in bold, black carpenter’s chalk and red ochre, with every under-road drain, water gate, and winch labeled in plain, working-class speech.
“Look here,” Nessa said. She pointed with her eight-foot land-mapper’s staff to the heavy red arc passing beneath the Hero Monument. “This is the old stone bypass channel built eighty years ago, before the guild decided magic was cheaper than stonework. The timber gates are rotted, but the limestone walls are solid dark rock. Mage Renn Tal has designed a gravity-fed balance weight water gate using four tons of quarry stone to balance the water pressure. When we open this bypass, the river will divert harmlessly into the South Holding Polders without touching the fen cottages.”
Renn Tal, standing near the doorway in his worn woolen smock, nodded slowly. His face was gray and lined with thirty-nine years of guilt. But his hands were steady as he held up a small wooden model of the balance weight gate. “The high-pressure balance is exact,” the old engineer said. “Two men on the winch can trip the release lever. Once the stone drops, gravity does the work of forty soul-coils. The water has no choice. It follows the slope.”
Aven Lark stepped into the center of the floor. He carried a pair of three-foot uncoupling tongs forged from red copper and wrapped in five layers of vulcanized gutta-percha. “The static-electric charge in the pool coils is lethal. If a bare hand touches the bronze canisters while the current is circulating, the discharge will stop a man’s heart in three seconds. We have laid thirty deep-water lengths of braided copper chain from the vault floor down into the riverbed silt. Every canister will be grounded through salt-water before it’s lifted into the canvas carriers.”
Tomas unrolled the cargo manifests, showing the seven destination columns. “The seven hundred and thirteen deposits are divided into seven community batches. Each batch will be carried in a pitch-sealed cedar chest lined with dry oat chaff. Fen Hollow takes ninety-four. Brook End takes one hundred and twelve. White Steps takes one hundred and forty. Old Flint takes eighty-eight. Reed Bank takes one hundred and five. Willow Stair takes twenty-six. Lantern Bend takes one hundred and forty-seven. Mirelle Voss takes Oren’s plate.”
Nurse Venn looked at the destination maps, her eyes calm and resolute. “And if the watch attempts to seize the chests at the street gates?”
Before Tomas could answer, Orrin Hale knelt at the eastern edge of the linen drafting cloth, his heavy quarryman’s thumb tracing the chalk line where the old dark rock bypass channel met the Lower Culvert arch. “Forget the street gates for a moment, porter,” the White Steps elder said. He tapped the floorboard with his iron-shod rule. “Look at the third stonework pier under the old fish-market cellar. In Year Twenty-Six, when the trade ring widened the toll bridge, their contractors dumped four hundred cartloads of rubble limestone and broken kiln-brick straight down the air-flow shaft to save hauling fees. If that rubble has cemented itself into the lime silt on the channel floor, Renn Tal’s balance weight gate will open into a plugged throat.”
A murmur ran around the circle of fifty river workers. Several canal boatmen leaned forward, squinting at the red ochre slope marks Nessa Vale had snapped across the cloth.
Nessa didn’t flinch. She reached to the pine frame stand behind her. Then she lifted a four-foot iron core-auger whose spiral bit was still crusted with wet, blue-gray river clay and crushed mussel shell. “Apprentice Olla and I crawled that air-flow under-road drain at yesterday’s slack water,” Nessa said, laying the heavy auger directly across the chalk mark of the third pier. “The trade ring contractors billed the city for four hundred loads of limestone rubble, Master Hale. But they stole three hundred and fifty of them to pave the carriage drive at Holt’s summer villa. There’s less than eighteen inches of loose brickbat sitting on the dark rock apron. Six quarrymen with crowbars and muck-baskets can clear the lip in forty minutes before the main water gate drops.”
Mara Flint stepped forward from the Old Flint delegation, adjusting the leather tool-apron across her broad hips. “Give me eight of my wedge-men and two block-and-tackle rigs at the third manhole cover by three in the morning. We’ll have the brick cleared and the dark rock floor swept clean to the chisel-marks before the first bell rings at the chapel.”
Renn Tal knelt stiffly beside Nessa’s wooden model of the balance weight water gate, his age-spotted fingers resting on the tiny timber balance beam. “There’s one more physical burden you must understand before any man puts his shoulder to the winches,” the old engineer said. He looked up at the faces of the draymen and boatmen. “When we trip the four-ton quarry stone and the three bypass gates rise together, the sudden drop in head pressure inside the monument intake race will create a three-minute empty pocket surge. The iron floor plates in the vault will shudder. The liquid silver column in the central metal tube will boil against the quartz glass. If the grounding crew panics and drops the copper chains while that surge is passing, the static charge will jump the air gap to the wet stonework.”
Aven Lark lifted his gutta-percha-wrapped copper tongs so the animal fat light gleamed off the thick black heat padding. “Nobody in my vault crew touches a bronze canister until the spirit-level on the main water chute settles to zero,” the artificer said firmly. “I need four carriers with dry wool gloves and rubberized oilskin boots to stand on the timber insulating racks and pass the canisters from my tongs into the oat-chaff chests. No belt buckles, no iron boot-nails, no steel pocket-knives inside the bronze railing.”
Tomas shifted his weight. He felt the pull of the ash splint against his left palm inside the black sling, and used his right hand to tap the seven numbered columns on his manifest board. “Jory, Brann, and two of Lani Moss’s flatboat pole-men have already had their boots pegged with wooden dowels in Brann’s shop this afternoon,” Tomas said. “Every chest has rope beckets spliced with dry hemp—not an ounce of iron hardware on the inner carriers. Each canister comes out of the liquid silver bath. Then, Aven grounds it to the riverbed copper grid, reads the stamped number aloud. I check it off the master roll while Hester Quill witnesses the extraction.”
Ada Fen folded her arms across her wool shawl, her gaze moving from the chalk lines on the cooperage floor to the tall windows where freezing rain ticked against the horned-glass panes. “Forty years ago, when the guild court guards came down to Fen Hollow with their brass badges, they read us a six-page proclamation in court Latin and told us our ditches were being flooded for the scientific preservation of the municipality. Nobody in our lane knew five words of their Latin. So we stood on the roof-beams and watched the water take the sheep. Tonight, I can look down at this floor and see every foot of stone, every pound of balance weight, and every boat-landing between the monument and my kitchen door.”
She reached down, picked up a piece of white carpenter’s chalk from Nessa’s tray. Then she drew a bold cross beside the Fen Hollow unloading landing at the south polder dike. “Our six flat-bottomed hay-wagons will be waiting at the under-road drain steps with greased axles and dry tarpaulins at five o’clock. Tell us what happens if Holt’s men try to block the street above us.”
“Captain Wren has twenty-four loyal men holding the outer edge under our lawful search order,” Tomas replied. “Thess Arden’s quarry guards have sealed the under-road drain entrances against Holt’s hired blades. We don’t run. We don’t hide. We move in broad daylight under the common law of the realm. Every carrier will hold an approved manifest signed by the seven councilmen. If they stop one wagon, six others will keep moving.”