The first black thread crossed the last supported terrace before Mercy had cleared the belfry.
Tava saw it through the rear window and turned toward Nadia. “You said we would ask them next.”
“We will.”
“Then turn the train.”
Oliver’s hand remained on the throttle. The eastern route pulled Mercy forward, its rails bright beneath the wheels. Behind them, Veyr Reach tilted into the dark. The unsupported terraces had begun to rise in separate slabs, each one caught in a web of black lines. Roofs tore loose. A woman clung to a chimney while a table spun past her shoulder.
“The route ahead is the only stable path,” Oliver said. “If I reverse, Mercy may lose the boundary around the terraces we already marked.”
Tava held up the brass plate in her hand. Dust had collected in the grooves of its engraved name.
“Those people are still ours to warn,” she said.
Nadia looked through the rear window. The supported terraces glowed gold, linked to Mercy by narrow paths. Between them, the unanswered sections drifted upward toward the source. The old instinct pressed against her ribs: gather everything, make the boundary wider, become the answer before anyone else could choose.
The core answered with heat.
She turned from the window. “Oliver, can Mercy return without breaking the paths?”
He checked the gauge. The needle trembled over the blank region marked with Mercy’s name. “The blank route can take us back. It will spend the reserve.”
“What happens when it runs out?”
“We arrive with no margin.”
Tava stepped closer. “How long do we have?”
Oliver watched the black threads tighten around the fragment. “Less than the source needs to sort them.”
“Turn us around,” Nadia said.
He did not move. “The people inside the boundary will be left with less support.”
Nadia faced him across the cab. “Can they remain connected if we return?”
His eyes held hers. In the furnace glass, the separate lights of Veyr Reach trembled like stars reflected on water. Nadia knew what he was asking without saying it. If she ordered the turn, she would be deciding for the supported terraces as well as the people still outside them. If she waited, the source would make a decision that could not be undone.
She placed her hand on the brass lever.
“I choose the return,” she said. “The terraces can choose whether they stay connected.”
Oliver’s shoulders lowered. He pulled the lever marked with Mercy’s name.
The train bucked. Gold paths stretched behind it, thin as spun wire, and the bell’s separate boundary swung wide to follow. The forward route collapsed into sparks. Mercy rolled backward through the dark, wheels screaming against rails that had not expected to be used in reverse.
The source noticed.
Black lines whipped across the fragment. They fastened to the unsupported houses and lifted them toward a widening chamber of darkness. Within that chamber, objects appeared in ordered rows: doors, lamps, tools, beds, names cut from stone. The source sorted each thing as it rose.
“Cargo,” Edrin said through the speaking tube. Her voice came from the furnace room, steady beneath the train’s strain. “It is making a station.”
Nadia gripped the rail beside the cab window. “Can it sort living people?”
“It has done worse.”
Tava climbed onto the rear platform. Wind tore at her coat. “There are families under the mill terrace. The west road runs beneath it.”
“I know the road,” Pella said from the carriage behind them. “The millstone is there.”
Her voice came through the open door. Tomas stood beside her, his lamp raised. Its light remained separate from the gold network, but the rails brightened wherever it shone.
Harn appeared at the next window, pale and braced against the carriage wall. “If they cannot answer, the source will call that agreement.”
“Then we make room for the answer,” Nadia said.
The boundary reached the first unsupported terrace.
Gold struck the stone and spread in a narrow ring. The house foundations steadied beneath it, but the source’s threads held the people outside the ring. A boy crouched beside a collapsed water trough, both hands over his ears. Two adults pulled at a rope tied around a drifting shed. Farther uphill, a cluster of villagers pressed against the remains of a wall.
Tava seized the speaking tube. “Veyr Reach! This is Tava Ors in the train. You have a path to us. Choose what you will stand with.”
The source answered through the ground.
“THEY HAVE BEEN LEFT.”
The black chamber opened wider. The names on the Memorial Stone rose above the terraces, each one glowing with the cold light of an abandoned object.
Tava’s face tightened. “They are frightened.”
“Fear can answer,” Edrin said. “Silence needs room.”
Nadia stepped onto the rear platform. The wind tried to pull her upward, and the gold seed beneath her ribs flared in response. She reached toward the boundary, then stopped with her hand open.
“People of Veyr Reach,” she called, using the speaking tube. “The boundary will not take you. It will not carry you. It will give you a place to answer.”
The boy by the trough looked up.
“What if I don’t know?” he shouted.
Harn leaned toward the tube before Nadia could reply. “Say that.”
The boy swallowed. “I don’t know what to choose.”
A small gold point appeared beneath him. It held without drawing him closer to Mercy.
Harn put both hands around the window frame. “That is an answer.”
The source pulled at the boy. The gold point strained, and the boy’s boots lifted from the earth.
Nadia drove her palm into the boundary.
The seed gave her a path. It ran from the boy to the water trough, then from the trough to the broken road. It did not claim his uncertainty. It gave that uncertainty somewhere to remain.
“Others,” Tava called. “Speak for yourselves.”
A woman beside the shed raised her arm. “The shed and my brother.”
An old man near the wall said, “The wall. I will not leave the people behind it.”
A girl with a torn red scarf pointed toward the mill terrace. “The millstone.”
Pella’s lamp-bright millstone answered from the earth below. Its support joined the new path without becoming part of the train.
The source drew harder.
The girl fell to her knees. The black chamber pulled the mill terrace upward, dragging the old man’s wall and the shed into its rows. Tava struck the brass plate against the rail. The clang cut through the source’s voice.
“My name is Tava Ors,” she said. “I choose the people who are still deciding. I choose to warn them.”
The bell beside Mercy answered with a deep note.
Mercy’s boundary widened by the length of a street.
Tomas raised his lamp. Its separate glow caught the broken road and held it level. Pella’s support steadied the mill terrace. Harn’s pale light settled beneath the boy, preserving a circle of ground for his unanswered choice.
The black threads snapped from the people.
They did not retreat. They turned toward the Memorial Stone instead, wrapping its names in bands of dark metal. The Stone began to descend into the source’s chamber.
Edrin’s voice sharpened. “It is taking the anchor.”
Nadia looked at the names glowing above the fragment. Some belonged to people who had left. Some belonged to the dead. All of them had been made into evidence against the living.
“Can the Stone choose?” she asked.
The bell rang once. Its sound traveled across the gold paths and struck the Memorial Stone.
A name flared.
Then another.
The Stone did not speak in a single voice. It answered through separate letters, separate marks, separate absences. The names remained names. The source’s claim lost its clean edge.
The chamber shuddered.
“Now,” Oliver called from the cab. “Nadia!”
The blank route was nearly gone. Mercy’s gauge showed a narrow silver line leading back toward the eastern track, and the needle trembled at its end.
Nadia had one choice left before the return consumed the reserve. She could pull the boundary after the people already reached, or extend it toward the lowest terraces where black threads still held dozens beneath the roofs.
Tava saw her hesitation. “Do not make them part of us,” she said. “Give them the same chance.”
Nadia reached for the gold seed.
The boundary crossed the road, the mill terrace, and the exposed roots below the houses. It stopped at each person who answered. A few chose doors. One chose a bridge. Three chose their family members. Several said they were afraid. The gold marked each answer separately.
The rest remained outside.
Mercy’s return route lit beneath the wheels.
Oliver pulled the throttle. The train surged forward, leaving the supported terraces connected behind it. The source’s chamber closed around the Memorial Stone, but the Stone’s names still burned through the dark, refusing to become a single abandoned thing.
Tava stood at the rear platform until Veyr Reach vanished behind the curve of the fragment. The people Mercy had reached gathered along the separate gold paths. They had not been carried aboard. They remained on their own ground, connected by chosen supports and the warning of the bell.
The boy who had said he did not know still stood beside the water trough.
His gold point remained.
Tava lowered the brass plate. “We reached some.”
Nadia watched the unsupported terraces disappear into the black. “Some is a path.”
Beyond the forward window, three new signals appeared in the eastern dark. The nearest flickered from a fragment shaped like a broken stair. The farthest burned red, then white, then red again.
Oliver read the gauge. “The source has followed the network.”
Nadia looked at the lights and tightened her grip on the rail.
“Then we warn the next fragment before it arrives.”
Next
Mercy has reached the people it could, but three eastern fragments are now signaling—and the source is already traveling toward the nearest one.