The rookery of Winterfell was cold, open to the biting wind that swept down from the Wall. It smelled of feathers, guano, and ink.
Ned stood by the window, watching a black speck disappear into the grey sky. The raven carried a letter to the Citadel, informing the Archmaesters of the tragic, clumsy, and entirely accidental death of Maester Walys.
"A slip," Ned murmured to the wind. "A terrible slip."
He turned away from the window. The death of the spy was a necessary evil, a pruning of a rotten branch. Now, the tree could grow. But a castle without a Maester was a castle blind and deaf. He would need a replacement, and until then, he would have to be his own scholar.
Fortunately, he had a library in his head that made the Citadel look like a children's book collection.
Ned descended the stairs and returned to his solar.
He sat at the weirwood desk. It was covered in maps and ledgers, but Ned pushed them aside. He pulled a fresh sheet of parchment and a stick of charcoal.
Wiki: Search "Glass Manufacturing - Pre-Industrial."
The information scrolled behind his eyes, a waterfall of text and diagrams.
>> TYPE: CROWN GLASS / CYLINDER GLASS.
>> INGREDIENTS: SILICA SAND (70%), SODA ASH (15%), LIME (10%), CULLET (RECYCLED GLASS).
>> TEMPERATURE: 1700°C (MELTING POINT). LOWERED TO 1500°C WITH FLUX.
>> INFRASTRUCTURE: FURNACE, CRUCIBLES, BLOWPIPES, MARVER, ANNEALING LEHR.
Ned tapped the charcoal against the desk.
The North was dark. The North was cold. To feed his people in the winter, he needed sunlight. He needed heat. He needed massive, industrial-scale greenhouses that could withstand a blizzard.
The current "glass gardens" of Winterfell were small, made of thick, cloudy, expensive glass imported from Myr or Tyrosh. They were a luxury. Ned needed them to be a utility.
"Sand," Ned whispered. "Soda. Lime."
He began to sketch. Not a sword, or a castle, but a furnace. A beehive-shaped structure with intake vents for air and a raised floor for the crucibles.
He drew the tools. Long iron blowpipes with wooden handles. Pontils. Shears. A flat iron table—a marver—for rolling the molten glass.
"Rodrik!" Ned shouted.
Ser Rodrik Cassel entered the solar, looking weary but alert. The knight had been running the castle guard ragged since the return, ensuring the new "guests" were secure and the peace was kept.
"My Lord?" Rodrik asked, his whiskers twitching.
"I have a mission for you, Rodrik," Ned said, standing up and handing him a list. "A scavenger hunt."
Rodrik squinted at the parchment. "Sand? Limestone? Seaweed ash?" He looked up, confused. "My Lord, are we building a castle or... gardening?"
"We are building the future, Rodrik," Ned said grandly.
He pointed to the list.
"The sand must be white. Pure. No dirt, no clay. Look near the banks of the White Knife, upstream where the water runs fast. If not there, send riders to the coast."
"White sand," Rodrik repeated dubiously.
"Limestone is easy," Ned continued. "We have quarries full of it. I want it crushed. Powdered. As for the seaweed... burn it. I want the ash. Specifically, from the kelp that washes up on the eastern shore. It's rich in sodium."
"Sodium," Rodrik tested the word. It meant nothing to him.
"Just get the ash," Ned said. "And coal. Lots of coal. We need a fire hotter than a dragon's breath."
Rodrik sighed. He had served Rickard Stark, who was stern and predictable. He had served Brandon, who was wild but understandable. Ned... Ned was something else. A quiet man who came back from war with a head full of impossible ideas.
"I will see it done, my Lord," Rodrik said. "Though the master of the stables will wonder why we are carting sand instead of hay."
"Let them wonder," Ned said. "Go."
Next, Ned went to the smithy.
Mikken was a man of few words and much iron. He was currently hammering a dent out of a breastplate, the rhythmic clang-clang-clang filling the smoky air.
He stopped when Ned entered.
"My Lord," Mikken grunted, wiping soot from his forehead. "Ice needs polishing?"
"Ice is fine," Ned said. He laid his sketches on the anvil. "I need tools, Mikken. Strange tools."
Mikken leaned over the drawings. He frowned.
"These are... pipes," Mikken observed. "Hollow iron pipes. Five feet long. With a flared end."
"Blowpipes," Ned confirmed.
"And this?" Mikken pointed to a drawing of a large, flat iron table with raised edges.
"A casting table," Ned said. "It needs to be perfectly flat, Mikken. Smooth as a mirror. If there is a pit or a bump, the glass will crack."
Mikken looked at Ned as if he had grown a second head. "Glass, my Lord? You want me to make tools for glass? I'm an armorer. I make steel that kills men, not... trinkets."
"This isn't for trinkets," Ned said, his voice dropping an octave, channeling the Lord's Command. "This is for survival. This is for bread in the winter. Can you do it, or do I need to find a smith in White Harbor who isn't afraid of a challenge?"
Mikken bristled. His pride was thicker than his arms.
"I can make anything that can be made of iron," Mikken growled. "But hollow pipes... that's tricky work. Keeping the bore straight..."
"Use a mandrel," Ned suggested, the Wiki supplying the technique. "Wrap the hot iron around a rod, then hammer the seam weld."
Mikken stared at him. "A mandrel. Aye. That... that would work." He looked at Ned with new respect. "You know the smith's trade, Lord Stark?"
"I know a little about a lot of things," Ned said. "I need these in two days, Mikken. And the table. Heavy iron. Thick enough to hold heat without warping."
"Two days," Mikken muttered, looking at the pile of work already waiting. "I'll have to put the lads on the night shift."
"Pay them double," Ned said. "And double for you if the table is flat."
Mikken grinned, his teeth white in his blackened face. "It'll be flat as a frozen lake, my Lord."
The next two days were a flurry of preparation.
Ned selected a site for his experiment—a sheltered courtyard near the Glass Gardens, close to the hot springs. The geothermal heat wouldn't melt the glass, but it would keep the ambient temperature high, preventing the glass from cooling too fast and shattering (thermal shock).
He had masons build the furnace. It was a crude thing compared to the industrial beasts in his memory, but it was solid. Brick lined with clay, fed by a bellows system that Ned had redesigned for higher airflow.
Benjen found him there on the second afternoon. The younger Stark was covered in mud from the training yard.
"You're building an oven?" Benjen asked, looking at the dome-shaped structure. "Are we baking bread for giants?"
"We're cooking sand, Ben," Ned said, smearing clay over a crack in the brickwork.
"Cooking sand," Benjen repeated flatly. "Right. And Arthur Dayne is actually a nursemaid. The world has gone mad."
"Madness is just genius that hasn't worked yet," Ned said, stepping back to admire the furnace. "I need your help tomorrow. You and Rodrik."
"My help? I don't know how to cook sand."
"I need you to pump the bellows," Ned said. "It needs to be rhythmic. Constant. If the temperature drops, the glass hardens. If it spikes, it bubbles."
Benjen sighed. "I'm the heir to Winterfell—well, second in line now—and I'm a bellows-boy."
"It builds character," Ned promised. "And deltoids."
"Del-what?"
"Shoulder muscles. Trust me."
---
The morning of the third day was crisp and clear.
The materials were ready. Rodrik had found the sand—fine, white silica from a river bend. The seaweed ash was grey and pungent. The limestone dust was chalky.
Mikken had delivered the tools. The blowpipes were rough but straight. The casting table was a slab of dark iron, heavy and smooth.
Ned stood before the furnace. He wore a heavy leather apron over his tunic, thick gloves.
Rodrik and Benjen stood by the bellows, looking skeptical.
"Light it," Ned ordered.
They pumped. The coal inside the furnace caught. The fire roared.
Ned waited. The temperature gauges in his head were silent, but he knew the color of heat. Cherry red was 700 degrees. Orange was 1000. He needed yellow-white.
"Harder!" Ned shouted over the roar of the flames. "We need white heat!"
Benjen and Rodrik grunted, heaving on the lever. The bellows wheezed and blasted air into the heart of the fire.
Ned adjusted the intake dampers at the base of the furnace. He had designed them to create a Venturi effect, accelerating the air as it entered the combustion chamber.
More oxygen. More heat.
Inside the furnace, the crucible—a clay pot filled with the sand mixture—was glowing brighter and brighter.
"Gods!" Rodrik yelled, shielding his face. "It's like the seven hells in there!"
"Keep pumping!" Ned commanded. "Don't lose the rhythm!"
He watched the crucible through a small mica observation port. The mixture was clumping, then slumping. The flux—the soda ash—was doing its work, attacking the silica structure, lowering the melting point.
The solid became liquid. It surrendered to the chemistry.
"Ready," Ned whispered.
He grabbed the long iron blowpipe. He thrust the tip into the glory hole of the furnace, dipping it into the crucible. He twisted it, gathering a glob of molten glass—a glowing, honey-like blob of pure light.
He pulled it out.
"Move!" Ned shouted.
He turned to the casting table. He didn't try to blow it—that required skill he hadn't practiced yet. He was going for cast glass.
He held the pipe over the iron table. The glob of glass dripped, heavy and viscous.
Ned used his own strength to stabilize his hand. The weight at the end of the five-foot pole was significant, but his muscles were hard as iron.
He let the glass fall onto the table. It hit with a soft slap, spreading out like glowing syrup.
"Roller!" Ned barked.
He grabbed a heavy iron cylinder Mikken had made. He rolled it over the molten puddle, flattening it out.
The heat radiating from the glass was intense. Ned's face felt like it was sunburned instantly.
He rolled it flat. A sheet of glowing orange glass, maybe a foot wide and two feet long.
"Now the lehr," Ned said, sweating profusely.
He slid a broad, flat iron peel under the sheet. It was heavy, liable to deform if he wasn't careful. He balanced it, keeping his hands steady, fighting the urge to rush.
He moved it quickly to the second oven—the annealing lehr. This one was cooler, fed by the hot springs and a small coal fire. It would cool the glass down slowly over days, preventing it from shattering due to thermal shock.
He slid the sheet inside and closed the door.
Ned slumped against the wall. He was drenched in sweat, his hands shaking from physical exertion.
Benjen and Rodrik stopped pumping. They stared at the annealing oven.
"What... what was that?" Benjen asked, breathless. "It looked like... trapped sunlight."
"That," Ned said, grinning fiercely, "is a window, Ben. A window that will let us grow summer in the middle of winter."
They didn't stop with one.
Once the process was proven, Ned refined it. He directed Rodrik on the exact rhythm of the bellows. He showed Benjen how to mix the "batch" (the ingredients) to reduce bubbles.
He made six sheets that day.
By the afternoon, Mikken had come down from the smithy to watch. The blacksmith stood in the corner, arms crossed, watching Ned handle the molten material.
"It's like metal," Mikken rumbled, stepping closer as Ned gathered a new glob. "But it doesn't forge. It flows."
"It's a liquid that forgot how to freeze," Ned explained, spinning the pipe to keep the glob centered.
"You need a mold, My Lord" Mikken critiqued, his craftsman's eye taking over. "Rolling it by hand... it's uneven. If I make you a frame... an iron frame on the table... you can pour it in. Like casting an ingot."
Ned looked at the smith. "A frame. Yes. That would give us uniform thickness."
"I'll make it," Mikken said, turning away. "And longer tongs. You're going to burn your fingers off with those short ones."
Ned smiled. The industrial revolution wasn't a solo act. It was contagious.
Three days later, the annealing oven was cool enough to open.
Ned gathered his small council of industrialists—Benjen, Rodrik, Mikken. Even Ashara came, holding Cregan, curious about what her husband had been doing in the mud for three days. She wasn't alone. Elia Martell walked beside her, looking elegant even in Northern wool, holding the hand of her daughter. Arthur Dayne stood watchfully at the edge of the courtyard, his grey cloak blending with the stone.
Ned opened the lehr.
He reached in and pulled out the first sheet.
It wasn't perfect. It was greenish in color (due to the iron impurities in the sand), and it had a few bubbles. The surface was pebbled from the casting table. It wasn't the clear, invisible glass of the modern world.
But compared to the cloudy, thick, yellow mica or the expensive, small panes from Myrish lenses... it was a miracle.
It was a solid, relatively clear pane of glass, two feet by one foot.
Ned held it up to the sun. The light streamed through it, turning the ground green.
"By the gods," Rodrik whispered. "It's... you can see through it. Clearly."
"Imagine a roof made of this," Ned said, looking through the pane at his family. "Imagine a hundred acres of this, trapping the heat of the springs and the light of the sun. We could grow corn in December. We could have fresh apples in the Wolfswood."
Ashara walked forward. She touched the cool surface of the glass.
"It's beautiful, Ned," she said. "It's like ice that doesn't melt."
"It is clearer than the glass in Sunspear," Elia noted, her dark eyes reflecting the green light. "And thicker."
Cregan squirmed out of Ashara's arms and toddled over to the glass. He slapped it with a sticky hand. Thwack.
Rhaenys giggled, breaking away from Elia to join him. She was now three years old, steady on her feet, and full of curiosity. She patted the glass too, mimicking the younger boy.
"Shiny!" Rhaenys declared, her voice bright.
Cregan, delighted by the reinforcement, bent down and picked up a smooth pebble, offering it to the princess with a babbling drool.
Rhaenys took the rock solemnly. "For me?" she asked, her voice clear and articulate compared to Cregan's toddler speak.
"Ba!" Cregan confirmed.
Rhaenys inspected the rock as if it were a gemstone, before beaming at her cousin. "Thank you, Cregan."
Arthur Dayne watched the children play, a faint smile touching his lips.
"Strong, too," Ned laughed, looking at the handprints on his glass.
He handed the pane to Mikken. The smith inspected it, looking for flaws, tapping it with a fingernail.
"It's good work, my Lord," Mikken admitted grudgingly. "For cooked sand."
"We need more," Ned said, his mind already racing to the next step. "We need bigger furnaces. We need a team. Rodrik, take the glass to White Harbor. Show Lord Manderly. Tell him I need sand. Barges of it. And I need men who aren't afraid of fire."
"I'll go myself," Rodrik promised. "When he sees this... he'll empty the river for you."
Ned looked at Benjen.
"And you, Ben. You're my foreman. You know the mix. You know the heat. I need you to train the smallfolk. We're building a glassworks."
Benjen looked at the furnace, then at the glass. He grinned. It was the first time he had looked truly excited about his duties since the war.
"I'm in."