Chapter 46 of 50·7 min read·That same passage through the second fragment
The First Light Answers
Mercy reached the second fragment with one rail beneath it and no reserve in the gauge.
The rail ended at the sorting chamber.
Oliver eased the throttle, though the engine had stopped answering his hand in the ordinary way. The silver track appeared only where the warning ahead struck the dark. Each new section formed beneath the wheels and faded behind them, leaving the engine committed to whatever came next.
Nadia stood beside him at the cab window. Gold light moved beneath the skin of her wrist. The three signals flashed across the fragment: white from the upside-down tower, red from the buried houses, black from the chamber’s central object.
They did not blink together. White answered first, then red. The black light waited until both had gone dark.
“The nearest one is the tower,” Oliver said.
“Nearest to the engine.” Nadia watched the white pulse. “That doesn’t tell us where the person is.”
“Someone is there.”
“Or something the source wants us to call someone.”
He looked at the gauge. The needle rested against the empty end of the blank Mercy region. Its glass reflected the three lights, but the markings beneath them had changed. A thin line had appeared beside the white signal, leading away from the engine toward the fragment.
“The route is asking for a witness,” he said.
“Then we give it one. We don’t answer for the light.”
The tower swung below them. It had once stood on the fragment’s highest ridge; now its foundations hung open to the sky, and its upper rooms pointed toward the ground. Windows spilled chairs, books, and loose stones into the dark. A stairwell remained attached to the tower by a strip of masonry. White light burned at its bottom.
The rail bent down.
Oliver pulled the throttle. Mercy descended along the side of the fragment, wheels gripping a track that had no visible support. The engine tilted until the cab floor sloped sharply. Nadia put one hand against the wall and kept the other near her core.
A pressure gathered beneath the fragment. The source had seen them enter. Black threads rose from the sorting chamber and spread across the broken ground, passing through houses and courtyards without touching them. Every thread ended at the white light.
“It’s drawing the signal toward the chamber,” Nadia said.
Oliver watched the rail ahead. Three branches had formed around the tower. Two ended in black gaps. The third led to the white glow, but it crossed a bridge of loose stone that was rotating slowly in the air.
Next
Mercy must cross the collapsing underside of the fragment to reach the red signal among the houses, while Sera’s newly independent warning travels beside them and the source begins sealing the route.
Nadia looked at him. “The path may belong to the signal.”
“Then hold the space around it.”
She pressed her palm to the brass panel below the window. Gold spread through the engine’s frame and reached the first span of rail. It did not fill the gap. Instead, separate points of light appeared along the broken bridge, each one settling against a different piece of stone. The stones stopped rotating. None joined the others.
Oliver drove across.
The tower’s lowest room came up beneath them. The white light shone through a trapdoor. Mercy’s engine passed over the roof, scraped a chimney loose, and stopped with its front wheels hanging above the opening.
Something struck the underside of the engine.
Oliver reached for the brake. The lever moved this time, though it had no pressure behind it. A second blow lifted the rear wheels from the rail.
Nadia caught the cab door as the engine tipped. “The chamber has a claim on the tower.”
“Can you cut it?”
“I can separate the supports. I can’t cut what the source believes it owns.”
“Make room for the answer.”
She turned toward the trapdoor. “You’ll have to go down.”
Oliver looked through the opening. The tower’s interior descended in the wrong direction, with floors stacked beneath them and furniture fixed to walls that no longer knew which way was down. White light waited at the bottom. The source’s black threads had reached the room and were winding around it.
He took the signal lantern from its bracket beside the gauge.
Nadia caught his sleeve. “If the engine slips—”
“Keep it here.”
“That’s not a promise you can make.”
“It’s an instruction.”
Her fingers tightened once, then released him. “I decide when we leave.”
Oliver climbed through the trapdoor.
The first floor fell away beneath his boots. He landed on a wall, slid across a row of framed maps, and caught a banister that had become a horizontal rail. The tower groaned around him. Dust drifted upward past his face.
At the bottom, the white light sat inside a glass signal box. A person crouched beside it with both hands wrapped around the case. The figure wore a keeper’s coat, though one sleeve had torn free and floated above the shoulder. A brass plate at the collar read SERA KETT.
Oliver stopped several steps away.
The black threads pressed through the walls. The person looked at him without letting go of the box.
“Are you Mercy?” she asked.
“Mercy is the train.”
“Then you’re the carrier.”
“I’m the engineer.”
The woman glanced at the lantern in his hand. “That’s what carriers call themselves when they still think the load belongs somewhere else.”
He had heard the source use the same shape of accusation. Sera’s voice held no echo of it. She sounded tired and angry at the room.
“What is the signal?” Oliver asked.
“My warning.”
“To whom?”
“Anyone who can hear it.”
The threads tightened around the glass box. White light spilled onto Sera’s hands, and the source spoke through the tower walls.
Oliver raised the lantern but did not step closer. “Did you agree to be assigned?”
She stared at him. “I agreed to keep the tower’s signal.”
“That wasn’t my question.”
The room shuddered. A section of ceiling tore free and rose toward the chamber. Sera’s boots left the floor. She held the signal box against her chest while the black threads pulled at her coat.
“I agreed to keep it until the roads opened,” she said. “They opened. The tower broke. I kept sending because no one came.”
“You can stop.”
Her mouth tightened. “If I stop, the people below won’t know where the ground is.”
“The signal can continue without you being its owner.”
“That’s easy to say from a train.”
“It isn’t a train’s decision.” Oliver lowered the lantern. “It’s yours.”
The source drove a thread through the glass. White light vanished beneath a black seam. Sera cried out and pressed her forehead to the box.
Oliver moved forward. The floor tilted, carrying him toward her. He drove the lantern’s hook through a crack in the masonry and used it to hold himself in place.
“Sera,” he said, “name what you choose.”
She looked at him with fury. “You want me to abandon it.”
“I want you to answer.”
The tower gave a long, grinding turn. Through the broken wall, Oliver saw the red signal ignite among the houses below. The black light in the chamber answered immediately, trying to fold the red pulse into the white one.
Sera saw it too. “They’re sorting the calls together.”
“Yes.”
“Then I don’t have time.”
“You have enough time to say one true thing.”
The source pulled again. The signal box cracked. A bright line ran across its glass.
Sera’s hands shook. She looked down at the white light and spoke to it rather than to Oliver.
“I keep the warning because I choose to keep it. It belongs to the road that hears it. It does not belong to the source. It does not make me the tower’s carrier.”
The black threads recoiled from the box.
White light filled the room. It passed through Sera’s hands, along the walls, and into Oliver’s lantern. The engine above him gave a sharp metallic note. The rail across the broken bridge brightened, each stone holding its own point of gold.
Sera fell toward the wall. Oliver caught her coat and pulled her behind the signal box. The threads struck the space where she had been, then withdrew into the chamber.
Outside, the white signal rose above the tower and separated from the fragment. It did not enter Mercy’s furnace. It traveled beside the engine on its own narrow line, still burning in Sera’s lantern.
The first light had answered.
Oliver climbed back through the trapdoor with Sera behind him. Nadia had braced herself against the control panel. Gold supports held the engine above the tower, but cracks ran through the cab floor.
“Did she choose?” Nadia asked.
Sera stepped into the cab and held up the lantern. “I did.”
Nadia moved aside to make room, though the engine had little room left. “Then you can stay beside us until the route gives you somewhere else.”
Sera looked at the red signal below. “The houses are calling from under the fragment. Their roads are still there.”
Oliver studied the gauge. The white mark had settled into a separate line beside Mercy’s blank region. A second line formed beneath it, leading down through the broken houses.
The source had failed to combine the first answer with the others. It had learned where the next one was.
Nadia saw the line appear. “We go to the red light.”
Oliver reached for the throttle. “The bridge is breaking.”
“Then cross before it finishes.”
He pushed the lever forward. Behind them, Sera’s white warning continued along its own route. Ahead, the red signal flickered beneath the fragment as black threads began closing over the houses.
This time, the source spoke from every roof at once.
“ONE ANSWER IS INSUFFICIENT.”
Nadia placed her hand against the gold-lit panel. “It will have to learn.”