The rain ceased at noon, replaced by a raw, biting salt-wind that blew in from the estuary, turning the surface of the mudflats into a slick, shivering gray mirror.
Tomas stood in the center of the channel mud bar at dead low tide, the water having pulled back until the mudflats were exposed for three hundred yards in every direction. He wore his heavy thigh-high wading boots, the thick cowhide greased with sheep fat to keep out the salt muck. His woolen trousers tied was tight at the knees with rawhide thongs. Even with the boots, every step needed deliberate, rhythmic effort. The delta silt was dense and cohesive. That created a hollow, sucking empty pocket around the heels that threatened to pull a man down into the clay if he paused for more than three heartbeats.
Beside him, Nessa had set up a heavy ash-wood tripod in the mud. The legs were fitted with broad, flat wooden mud-shoes—round discs of elm eight inches across, pinned to the iron tips with cotter pins to prevent the tripod from sinking into the silt. Mounted on top of the tripod was a brass leveling sight, its spirit-level bubble centered perfectly between two fine scratch-marks in the glass.
Between Tomas’s boots lay the sampling tool: a six-foot hollow brass pipe, two inches in width, its lower rim beveled to a razor-sharp cutting edge. The upper end was fitted with a heavy cross-handle of turned oak, heavy with forged iron collars.
“The mud bar here is five hundred yards long,” Nessa said, her voice muffled slightly by the wool scarf wrapped around her neck and lower jaw. She adjusted the leveling screw on her transit with gloved fingers. “It sits right across the mouth of the old fairway like a dead whale. The trade ring claims this bar formed during the spring flood three months ago—an ‘Act of Sudden Riparian Flooding,’ which exempts them from upkeep under their lease.”
“And if it didn’t form three months ago?” Sile Rook asked, leaning his weight against an iron-banded wooden maul.
“Then it’s twenty years of criminal neglect,” Tomas replied. He set his hands on the cross-handle of the brass pipe.
He set the beveled cutting edge against the gray surface of the mud bar, three paces out from the centerline of the channel. The top layer of silt was soft, loose, and yellowed by recent river runoff. He smelled faintly of rotting vegetation.
“Hold the plumb, Nessa,” Tomas said.
Nessa stepped to the pipe, holding a brass spirit-level against the upright metal shaft. “Straight. Half a degree east. Bring the handle toward your hip. Hold.”
Sile stepped up to the tripod. He spat on his calloused palms. He raised the fifteen-pound oak maul in a smooth, high arc over his right shoulder. Then he brought it down squarely onto the iron collar at the top of the pipe.
THWACK.
The sound was dull and heavy, swallowed instantly by the vast, flat expanse of the delta mudflats. The brass metal tube drove six inches into the clay.
“Again,” Tomas said, his boots bracing against the suction, his hands gripping the oak cross-handle to keep the tube from twisting. In his left forearm, the gristle of his scar pulled tight with each impact. But the calfskin brace absorbed the shock. That kept the wrist from buckling.
THWACK. THWACK. THWACK.
Twelve blows drove the pipe down through the mud. With each foot of depth, the pushback changed noticeably. The first twelve inches were soft and greasy, the pipe sinking with a wet, squelching sigh. Between twelve and twenty-four inches, the brass struck denser, firmer material. Stiff, cohesive gray clay that rang with a dull, muffled metal shudder under the maul. Below three feet, the pipe struck a layer of coarse, gritty sand that grated against the cutting edge like broken glass.
At four feet eight inches, the pipe stopped dead. It didn’t bounce. It struck something unmoving with a sharp, ringing CLINK that shook through the brass straight into Tomas’s palms.
“Bedrock?” Sile asked, leaning on the maul, his breath puffing in white clouds against the cold salt-wind.
“Not bedrock,” Nessa said, her eyes flashing with grim satisfaction. “Dark rock. That’s the dressed paving stone of the Causeway roadbed.”
Tomas nodded. He reached into his belt loop, withdrawing two heavy hemp snubbing ropes fitted with iron eye-hooks. He looped the ropes around the oak cross-handle. He passed the free ends through the side-rings of a four-foot ash-wood lever bar.
“We need the suction broken,” Tomas said. “Miller, take the right lever. Sile, take the left. I’ll take the center lift.”
The three men leaned their weight onto the lever bar. Tomas set his knees against the mud. He locked his hips. He used the long porter’s leverage that had carried seventy-pound packs up the Bellwether bluff stairs for nine years.
“Heave!” Tomas grunted.
The mud fought back. The empty pocket inside the four-foot hole held the brass pipe with the stubborn, desperate grip of the delta itself. For five seconds, the wood of the lever groaned, bending in an arc under their combined weight. Then, with a loud, wet, echoing SCHLUCK, the seal broke.
The brass pipe slid upward out of the mud, dripping with gray, rotten-egg clay.
Tomas caught the lower end with his gloved hands. He swung the six-foot metal tube horizontally onto two split-log frame stands they had carried out from the skiff.
“Bring the core splitter, Olla,” Nessa commanded.
Olla ran forward across the mudflats, her mud-shoes slapping wetly against the silt. He carried a long, thin steel wire fitted with two wooden handles. A land-mapper’s wire-saw used for cutting clay samples.
Nessa fitted the wire into the lengthwise slot cut into the brass sampling metal tube. With slow, steady pressure, she drew the steel wire through the core from top to bottom, slicing the four-foot column of pulled out mud cleanly in half.
Tomas carefully lifted away the top half of the brass casing.
The inside of the core lay exposed to the cold daylight. A four-foot metal tube of perfectly preserved delta history, cut as clean and sharp as a layered cake on a baker’s table.
Nessa knelt on the mudflats, her magnifying lens in hand, her face inches from the exposed silt.
“Look at the stratification,” Nessa whispered, her voice trembling slightly with skilled awe. “It’s amazing. It’s a complete calendar.”
Tomas leaned down beside her.
The mud core was not a uniform mass of gray clay. It was divided into dozens of distinct, paper-thin level bands. Alternating layers of dark brown winter silt, pale yellow summer sand, and black ribbons of tightly packed marsh peat.
“Count the winter bands,” Tomas said.
Nessa took a brass measuring needle, touching the fine dark ribbons one by one, moving from the top of the core downward toward the dark rock base.
“One... Two... Three... Four...” Nessa counted, her voice steady and relentless. “Five... Six... Seven... Eight...”
She continued down the length of the metal tube.
“...nineteen... Twenty... Twenty-one... Twenty-two.”
She looked up at Tomas, her gray eyes cold as river ice.
“Twenty-two annular settled mud layers,” Nessa said. “One for every winter since the flood dikes breached in Year 017. And look at the texture. There’s not a single scour mark. Not a single dredge furrow. Not a single tooth mark from a bucket wheel.”
Tomas knelt beside the brass metal tube, inspecting the cutting edge of the pipe. The beveled brass lip was slightly curled on one side where it had struck the hard dark rock paving slab. He took his small flat file from his satchel, carefully drawing the hardened steel teeth across the burr to true the edge. The metal rasp sounded sharp and lonely across the gray expanse of the mudflats.
“Look at the fourteenth layer, Tomas,” Nessa said, her magnifying lens hovering two inches above the clay column. “See that thin, reddish line between the gray silt bands? That’s crushed brick and burned timber ash from the Great Foundry fire in Bellwether fourteen years ago. The ash washed down the river during the autumn rains and settled right here on the delta flats. That gives us a fixed chronological anchor. The layers below that red line were laid before the fourteenth year. The layers above were laid after. A judge can dispute our word. But he can’t dispute a stratum of town brick dust sitting four feet under tidal clay.”
Olla’s pen flew across her notebook, sketching the settled mud column with measured proportions, labeling the brick-dust horizon with careful cross-hatching. “Layer fourteen identified: Foundry fire ash marker, Year 025. Stratigraphic strength checked.”
She pointed to the very bottom of the core, where a half-inch layer of clean, white river gravel lay directly on top of the black dark rock stone.
“Here,” Nessa said, touching the white gravel. “This was the original dressing laid by the crown engineers in Year 017. The day the road was finished. And sitting right on top of that gravel is the first winter silt layer from Year 018. The silt began falling twenty-two years ago, Tomas. And nobody has touched it with a shovel from that morning to this.”
Tomas stood up. The wind was whipping the gray reeds along the distant bank, but in his chest, the last lingering doubt had vanished.
“Olla,” Tomas said.
The apprentice knelt beside the frame stand, holding open a long wooden core-box lined with waxed linen.
“Transfer the core into the box,” Tomas commanded. “Seal the seams with bees-wax. Label it: Physical Exhibit Alpha - Channel Bed Stratification, Sector IV. Witnessed by Carrier Tomas Reed, Surveyor Nessa Vale, Veteran Sile Rook, and Captain Barnaby Miller.”
He looked south toward the timber towers of Toll-Post One.
“Court guard Taggart told us the river silted up three months ago,” Tomas said. He wiped his muddy hands on his leather apron. “We have twenty-two years of stone-hard proof that says he’s a liar. Now we go find the charter that proves he’s a thief.”