The furnace had a colour for every temperature.
Gerald had not known this. He had looked at the furnace mouth from the doorway, from the stool, from the bench beside his bins, and every time the colour had been the same — orange. Bright, steady, too bright to stare at, the orange of heat itself. But that was what his eyes had been able to see. The furnace mouth was orange the way the mixed frit bin was blue — a first impression that covered what was underneath.
On the sixth morning of sorting, Gerald looked up from the cobalt bin and the furnace was not orange.
It was amber at the housing, where the stone gave the heat back in a deep, warm tone that did not shift. It was brighter at the door’s edge — a hotter amber bleeding toward yellow where the sealed gap between door and frame let a thin line of light through. And at the door itself, where the iron met the stone and the heat pressed outward in waves Gerald could feel against his face, the colour was white. Not the white of paper or snow. The white of something so hot it had gone past colour entirely, the light arriving with nothing left in it except intensity.
Three colours where he had seen one.
He went back to the cobalt bin.
The bins were filling.
The cobalt bin was more than half full now — a shallow field of blue grains, each one placed individually, each one checked against the window light or against the grain beside it or against the memory Gerald’s fingers were building of how cobalt felt between the thumb and the forefinger. The copper-green bin was a third full, the colour darker and more varied, the greens ranging from a pale grey-green at the lightest end to a deep forest shade that was almost black until light caught the interior. The manganese bin trailed behind — manganese was rarer in the working supply, the grains small and hard-edged, the dark brownish-purple of them unmistakable once Gerald had learned what to look for.
The fourth bin was the fourth bin.
Gerald did not sort the uncertain grains. He set them down when they arrived and left them there, each one a question he could not answer with his fingers or the window. There were fewer of them now than on the first day. Not because Gerald was guessing. Because fewer grains arrived at the border without declaring themselves. The ones that remained were genuinely ambiguous — the traces too faint, the contamination too subtle, the colour sitting in a place Gerald’s eye could circle but not resolve.
He left them alone.
Midmorning, a crucible cracked.
The sound was small — a single pop, no louder than a knuckle rapped on wood. Gerald looked up. Tomis was already moving. He crossed the workshop in four strides and pulled the shutter on the second furnace opening, the one where the reserve crucible sat heating. Gerald could not see the crack from his stool. Tomis could. He leaned in close enough that the heat must have been pressing against his eyes and then pulled back and said a word Gerald had not heard before.
Aaron stopped carrying a punty rod. He set it against the wall and came to the opening.
“Hairline,” Tomis said. “Bottom third.”
Aaron looked. He nodded once. Tomis closed the shutter.
Da came from the writing shelf. He did not hurry, but the pace was different from his writing-shelf walk — longer strides, the weight shifting forward. Tomis said the same thing to Da that he had said to Aaron, and Da opened the shutter and looked and closed the shutter and stood with his hand flat on the housing stone.
“Can it finish the day?” Da said.
“Finish, yes. Hold a full charge tomorrow, no.”
Da looked at the shutter for a moment that was longer than the moment before it. Gerald’s hands were still. The grain between his thumb and forefinger was forgotten.
“Pull it at close,” Da said. “We will set the replacement tonight.”
He went back to the writing shelf. Tomis turned to Aaron. “The reserve crucible in the storeroom. Check it for chips before you bring it. Run your hand along the inside lip.”
Aaron went. The workshop settled back into its rhythm, but the rhythm was different — Tomis checking the shutter twice in the next quarter-hour, his circuit passing the second opening each time. The cracked crucible was doing its work, the glass inside it still molten, still usable, but Gerald could see that Tomis was listening for it now. Not looking. Listening. The way you listen for a sound you hope does not come.
Gerald went back to his sorting. The grain between his fingers was cobalt. He put it in the bin.
The glory hole was a different orange.
Gerald noticed this on the step, eating his bread. The workshop door was open — Tomis left it open when the weather was warm enough, the cooler air from the yard mixing with the furnace heat in a current Gerald could feel against his shins. Cool from the ankles down. Warm from the knees up. He sat on the stone step with his bread on his knee, his water cup beside him, watching Tomis through the doorway.
Tomis was reheating a jar. Broad-bodied, the glass already shaped at the bench, the colour a deep cobalt that Gerald could identify from the step without standing. Tomis turned the pipe in both hands, the jar’s end inside the glory hole’s opening, the shutter pulled back, the heat coming out in a focused wave that was different from the furnace’s broader warmth.
The glory hole was brighter than the furnace. Gerald had known this — he had felt the difference every time Aaron opened the shutter and the hotter air pressed outward. But from the step, in the midday light, the difference was not just brightness. It was colour. The furnace behind it glowed a deep amber. The steady note. The colour of sustained heat. The glory hole glowed orange-white — sharper, the colour of temperature concentrated in a smaller space.
And the jar was changing.
The cobalt glass had gone dark at the bench, the surface cooling, the colour deepening toward the purple that cold cobalt carried. Inside the glory hole, the glass was coming back. The colour moved from the edges inward — the outer surface heating first, the deep blue softening to a brighter shade, the centre following, the whole piece warming back to the orange-amber of workable glass. Tomis turned the pipe. The rotation was steady, the jar moving through the heat evenly, no side staying longer than any other.
Gerald watched the timing.
Tomis counted it. Not aloud — Gerald could not hear counting. But the rhythm was consistent. The pipe went in. The jar heated. Tomis turned. The glass shifted from dark blue to bright amber to a specific shade of orange that Gerald could not have named and did not need to name, because what the shade meant was not a word. It was a readiness. The glass at that shade was workable. Tomis pulled the pipe out and went to the bench and the jacks found the glass at the moment the glass was ready to be found, and the timing of it — the seconds inside the glory hole, the speed of the turn, the shade of the glow — was a single thing that Tomis read the way Gerald was learning to read the colour in a frit grain.
The bread was gone. Gerald brushed the crumbs from his trousers and finished his water.
Tomis reheated the piece twice more. Each time the same rhythm. Each time the same shade at the moment the pipe came out. Gerald stayed on the step. The glory hole’s colour burned in his vision. When he blinked, the shape of it sat behind his eyelids — bright, round, the size of the opening, a circle of orange-white that faded slowly.
The third reheat ended. Tomis took the piece to the bench. The jacks pressed. Gerald heard the soft contact of metal against spinning glass, and the sound was right — steady, continuous, without the stuttering drag that meant the glass had cooled past its working point.
He could hear the temperature now.
Not the way Tomis could read the colour at the pipe’s end and know exactly how many seconds remained. But the sound the glass made under the jacks — the smooth sliding hiss when the glass was workable, the rougher drag when it was stiffening — was becoming a thing Gerald could distinguish without deciding to listen for it. The hiss said warm. The drag said cool. The transition between them was the same transition the colour made, the same readiness shifting to the same stiffness, and Gerald was hearing what he had been seeing, the two arriving at the same knowledge through different doors.
He stood up from the step. He carried his cup to the basin inside the door. Tomis did not look up. The jar was taking shape under the jacks, the neck constricting, the cobalt deepening as the glass cooled into its final register.
The afternoon was copper-green.
Gerald worked through a section of the mixed supply that was heavier in greens — copper-based frits, the grains ranging from coarse to fine, the colour shifting with the grain size. He was past the phase where every doubtful grain required a trip to the window. His eye had learned the copper-green through the same slow accumulation his fingers had learned the cobalt — not by studying it but by being near it, day after day, until the colour was a thing his eye carried without effort.
He sorted steadily. Green grains to the copper-green bin. Blue grains to cobalt. Manganese to its bin. The uncertain to the fourth.
A grain caught his attention.
It was green. Copper-green, the colour sitting on its surface in a flat, opaque coat. Gerald turned it between his fingers. The grain was the right colour. It felt like copper-green under his fingertip — the faint coarseness at the edges, the surface rougher than cobalt. But the light sat on it differently than the grain beside it. The grain beside it — also copper-green, also the right colour — had a depth to it. When Gerald turned it toward the window, the light came through. A faint glow from inside the grain, the colour going deeper than the surface, as though the green were not painted on but present all the way through, the grain lit from within.
The first grain did not do this. Its colour sat on the surface and stayed there. The light touched it and came back. Gerald turned it in the window light. The green was the same green from every angle — flat, opaque, the colour of something coated rather than something made.
He set both grains on the bench. He looked at them.
They were the same colour. If Gerald had been sorting by colour alone, both would go in the copper-green bin. Both were green. Both were copper-based. Both were clean of contamination. Nothing wrong with either grain except that they were not the same.
Gerald picked up another grain from the mixed supply. Green. He turned it in the window light. The colour went through. He set it beside the second grain — the one with the interior glow. He picked up another. Green, flat, opaque. He set it beside the first.
He worked through a handful. Grain by grain. Each one turned in the light, each one sorted not by colour but by what was beneath the colour — the difference between a grain that carried its green on the surface and a grain that carried its green all the way down.
He did not know what the difference meant.
He did not know if it mattered for blowing. Whether a surface grain melted differently than an interior grain. Whether the melt looked the same. Whether a glassblower could feel the difference in the working glass, or whether the difference vanished in the crucible and the colour that came out was one colour regardless of what went in.
He separated the two kinds anyway. The surface grains in a small cluster on the left side of the bench. The interior grains in the copper-green bin with the others. The interior grains were the majority. The surface grains were rarer — one in eight, one in ten. The numbers arrived on their own, the counting happening alongside the sorting.
His thumbs were aching. Not the large ache of the woodbox or the watering can. A small, insistent ache in the pads, where the grain pressed the same spot over and over, the skin tender from a week of the same motion. Gerald stretched his hands flat on the bench. The tendons pulled. He curled his fingers back and the ache was still there, sitting in the joints the way a splinter sits — small enough to work around, too present to forget.
He picked up the next grain and the ache flared and he dropped it.
The grain hit the bench and rolled toward the edge and Gerald caught it with his palm before it went over. A copper-green, interior, the colour going through. He set it in the bin. He picked up the next grain more carefully, shifting his grip so the pressure fell on a different part of his thumb.
It helped. For twelve grains, maybe fifteen. Then the new spot started to burn too.
Gerald put both hands in his lap. He looked at the bins. The copper-green was two-thirds full now. The cobalt was nearly there. The manganese sat at its own level, patient, the dark grains catching no light.
His thumbs throbbed.
He picked up the next grain. The ache was a thing he carried now, alongside the sorting. Both were the work.
The light moved.
Gerald had been aware of the light in the workshop for weeks — the afternoon sun coming through the high windows at an angle that changed as the season turned, the pale shapes on the floor reaching further across the stone each day. The light and the shadow trading ground in a progression that was slow, visible only because Gerald had been sitting in the same place long enough to notice where the light had been a week ago.
The pale rectangle that had fallen at the base of the tool rack was further into the room. Its edge touched the near side of Da’s bench. In another week it would reach the bench arms.
The furnace kept its note. The annealing oven glowed its deep, quiet red behind the corridor door — a red that was nothing like the glory hole’s orange-white or the furnace’s amber. The oven’s red was slower. The colour of what happened after the making, the controlled surrender of heat that kept the glass whole. Gerald could see the three colours now — furnace amber, glory hole orange-white, annealing oven red — three stations on a single line, the temperature descending, the glass moving through them in one direction, from the hottest to the coolest, the whole workshop arranged around that descent.
Behind him, Edric swore.
Gerald turned on his stool. Edric was at the marver, a gather on his pipe, and the gather had gone wrong — flattened on one side where the roll had caught, the glass sticking to the steel instead of turning smoothly. Edric yanked the pipe up. A thin thread of glass trailed from the gather to the marver surface and snapped, leaving a bright orange streak on the steel that dimmed as Gerald watched.
“Damn thing was too hot,” Edric said, to no one. He carried the pipe back toward the glory hole, and the gather on the end was lopsided now, the flat spot visible in the glow, and Edric’s jaw was set in the way it set when he was angry at his own hands.
Tomis glanced up from the bench. He did not say anything. Edric reheated the piece. The glory hole’s light flared when the shutter opened and Gerald saw the gather soften in the heat, the flat spot beginning to round as the glass found its centre again. Edric’s rotation was faster than Tomis’s — quicker turns, the pipe moving in short jerks rather than the steady roll. He pulled the piece out and went back to the marver and this time the roll was cleaner, the glass turning, and Edric’s shoulders dropped half an inch as the gather centred.
Gerald turned back to his stool.
Aaron passed, carrying a cooled piece to the finishing shelf. Gerald heard his footsteps — measured, both hands occupied, the pace that came from knowing exactly how far the shelf was without looking at it. The sound joined the other sounds. Furnace hum. Tomis at the bench, the pipe turning, the jacks pressing. Da’s pen at the writing shelf, the nib on paper, a small scratch between larger sounds.
Gerald picked up a grain. Turned it in the light from the window. The green went through. He set it in the copper-green bin.
The afternoon wore on. His thumbs carried their ache. The bins filled. The light crept further across the floor. Outside, somewhere in the yard, a chicken had got into the kitchen garden again — Gerald could hear Nessa’s voice, half-laughing, half-scolding, the words lost through the wall but the tone clear enough. A pause. Then the sound of the garden gate closing, and Nessa saying something to someone — Mary, probably — and a second laugh, different from the first, lower.
The workshop took no notice. Tomis checked the cracked crucible’s shutter. The furnace hummed. The light touched Da’s bench arms, and Gerald noticed, and went back to his grain.
He did not know what any of it added up to yet. He knew the colours, and the sounds, and the ache in his thumbs, and the cracked crucible that would come out tonight, and the grain between his fingers that carried its green to the centre.
Three colours in the furnace where there used to be one.
He set the grain in the bin and reached for the next.