The drying of the marsh mud was a slow, foul-smelling process that occupied the entire length of the forge apron for three days after the clerk's departure. Wat's apprentices had spread the purple-black slurry across wide slabs of flat limestone that sat directly above the furnace flues. As the underground heat baked the moisture out of the peat, a dense, sweetish vapor rose into the rafters of the smithy, coating the soot-blackened beams in a fine, lavender-tinged crust that made the forge-cats sneeze and water at the eyes.
Thomas stood by the secondary crucible, his shirt sleeves rolled up and tied with leather thongs to keep them clear of the blast. The furnace was running on a selective mix of deep-pit coal and charred birch roots, creating a intense, white-flecked flame that hummed inside the refractory firebrick like a swarm of angry hornets.
He held the phone in his left hand, the glass screen smudged with a mixture of charcoal dust and tallow grease.
Battery: 88%
Text Relay Only (Latency: +86,400.00s)
He had the raw terminal view open, his eyes scanning the crude numeric string he had extracted from his chemistry databases before the server update cut him off. It was a tedious method of verification; without the visual graphs or the automatic unit-converters of his college software suites, he had to calculate the volume of the crucible against the specific gravity of the bog-ore powder using nothing but a piece of chalk on the side of a fuel bin.
"The powder is dry, Thomas," Wat said, stepping up to the hearth with a heavy iron shovel. He dumped a heap of greyish, roasted dust onto the cedar block between them. The material didn't look like iron ore; it looked like the fine ash from a baker's oven, but it held a peculiar weight that made the wood beneath it creak. "We ran it through the wire sieve twice like you said. It's as fine as flour, but if you drop a spark on it, it doesn't burn—it just turns red and stays hot until the sun goes down."
"That's the manganese, Wat," Thomas said, using his chalk to finish the last line of the ratio string on the bin. "We need exactly four parts of that powder to forty parts of the un-slagged iron bloom from the upper kiln. If we go over the tally, the steel will be too brittle to drill; if we go under, the teeth on the main axle will shear the first time Cerdic engages the water-gate flume."
"The boys are ready with the bars," Wat said, signaling to his two sons who stood by the cooling trough. They held long tongs clamped around three square blocks of raw, low-carbon iron—the soft bloom that had been hammered twice to clear the river sand but still lacked the strength to hold an edge.
"In they go," Thomas said.
The iron blocks went into the clay-lined pot with a heavy, dull clatter. Wat followed them with four precise shovels of the grey manganese powder, capping the mixture with a two-inch layer of crushed charcoal dust to seal the melt against the outside air. They hoisted the crucible into the center of the white blast using an iron chain crane that Wat had rigged to the main roof tree.
The reaction was not immediate, but within twenty minutes, the furnace pipe began to whistle—a high, clear note that meant the carbon from the birch roots was combining with the manganese dioxide at more than fourteen hundred degrees. The smoke from the chimney shifted from its usual greasy grey to a sharp, beautiful violet that drifted across the courtyard of Argenton like a thread of dyed silk.
Thomas sat back on an empty timber crate, his ribs aching from the heat of the rim. He pulled the glass slab closer to his face, his thumb tapping the messaging icon automatically.
A new line of text had completed its relay through the drift, its time-stamp indicating it had spent nearly thirty-six hours in the temporal grain before finding the phone's receiver.
Mom: Tom, I found your old software engineering graduation gown in the back closet. It still smells like that cheap laundry detergent you used to buy at the corner store. I can't believe it's been three years since you stood on that stage at Regis. Your father would have been so proud of that degree, honey. I'm putting it in a cedar chest to keep the moths out. Let me know when you're coming down from the mountains.
Thomas stared at the word Regis until the green letters began to look like the geometric lines of Elias's map. He looked down at his own chest—at the dark line of coal grease that ran from his throat to his belt, at the raw red burn on his forearm where a spark from the crucible had caught him during the morning pour.
He wasn't a software engineer anymore. He was an actinide chemist working with tools that would have looked primitive to a blacksmith in the nineteenth century, trying to force a medieval valley to accept the logic of a system that hadn't even been dreamed of when his ancestors were laying the stones for the Oakhaven cathedral.
"Thomas," Victoria said, her voice cutting through the mechanical hum of the forge. She had entered from the lower weavers' lanes, her hair tied back with a strip of leather, her fingers black with the ink of the daily scrip logs. "The carters from the southern pass have returned. They didn't bring the copper ore from the coast. They say the Baron's riders have set up a timber toll-gate at the three-mile marker, and they are demanding two yards of our fine-weave for every horse that crosses the line."
Thomas stood up, his cloak sweeping the grey manganese dust from the edge of the block. He tucked the phone into his tunic, his thumb automatically locking the interface.
"Did they pay the toll?" Thomas asked.
"They had to leave two bales behind to keep the horses," Victoria said, her eyes dark with the cold anger that usually preceded a hard ledger entry. "The carters say the Baron has thirty men-at-arms at the gate now, all with long lances and iron breastplates. They are telling the merchants that the road belongs to the household of De Born, and that the Lord of Silver Hill is nothing but an intruder with an un-kingly mark."
Wat looked up from his bellows, his single good eye glittering under his wet leather cap. He held a heavy steel crowbar in his right hand, the metal still blue from the grease-quench. "The crucible will be ready to pour by noon, Thomas. If we run the steel into the long molds, we'll have twenty more pike-heads before the sun hits the ridge. We can take Cerdic's boys down to the markers and show the Baron what our iron looks like when it's cold."
"We don't go to the markers, Wat," Thomas said, walking to the door of the smithy where the cool river air cleared the sulfur from his lungs. He looked toward the southern pass, where the watchtower stood silent against the heavy grey clouds. "The toll-gate is a validation check. The Baron wants to see if we'll waste our strength trying to hold a line three miles out in the woods where his horsemen have the room to turn our pikes."
"Then we let him keep the copper?" Victoria asked, stepping up beside him.
"We let him keep the road for today," Thomas said, his voice flat and steady, carrying the clinical cadence of an engineer who was adjusting a valve to handle an unexpected pressure spike. "We have enough ore in the storehouses to run the looms for two weeks. We finish the wall at the river gate, we sharpen the pikes, and we wait for the Tuesday shipment. When the Archbishop's proctor finds out his cloth is sitting behind a Baron's toll-gate, he won't come to me with a ledger—he'll go to the King with a sword."
He looked down at his hand, where the purple mud from the northern bog had left a hard, permanent stain around his cuticles. The future was still a block of unindexed text on a hot screen, but as the violet smoke from the chimney rolled across the red brick roofs of Argenton, Thomas knew the script was running exactly as he had written it.