The people of the Soot did not dismantle the wall at once.
First they asked for the number of living, the number of wounded and the number of sparks. Then they asked whether there was a conductor among the passengers. Only after Saya answered did they remove three bricks from the masonry and push a copper tube through.
"Let the cold form touch the metal," a woman's voice demanded. "If the pipe darkens, you stay on that side."
Irsa touched the copper. Red-grey frost spread over the tube, but it did not blacken.
Then they began to dismantle the wall.
Beyond it lay the lower station, cramped and warm. Old stoves stood directly between the tracks. Bread dried on them, water boiled and bricks were heated for the houses. The people of the Soot wore no city seals. Many covered their necks with scarves to hide the marks left by the removal of their personal fires.
The district lived on what the upper circle considered waste. Cracked rails became beams. Cold ash was sifted and added to bricks. Steam from old pipes was diverted into laundries and greenhouses beneath the platform. Nothing was thrown away here, because new material arrived only with the Chamber's permission.
The passengers were given water, but were not allowed to scatter among the houses. The wounded were laid beside one communal stove where everyone could see them. The people of the Soot did not want to hide in secret those whom the city had already declared nonexistent. A secret refuge could later be denied. Open aid made the whole district a witness.
Marek noticed a small sack of white salt beside every stove. The Soot feared memory storms no less than the Chamber did. The difference was who held the sack and who decided when to open it.
The first to approach Marek was Dara Vin, a stove-setter. A short woman with burned fingers, she held a wooden peel like a weapon.
"We'll let the passengers in," she said. "You and the choir come after the inspection."
"They won't hold without me."
"Then stand by the wall and hold them. The Soot has seen saviours before who asked for one stove at first, then claimed every dead person as their own."
Marek felt irritation rise in him. He had just pulled people out of the carriage, led them through a flooded tunnel and nearly lost the choir to rain and salt. But Dara was under no obligation to repay someone else's rescue with trust.
Saya proposed a test the Soot understood.
She placed the clay vessel belonging to Yuna's mother on the table and asked for three witnesses. In front of them all, she cut the temporary seal, passed the silver thread through the memory heat and separated out the last message.
The people waited for a prophecy, a warning or a secret.
The voice was quiet and ordinary.
Yuna's mother had wanted to remind her that the spare button was in the blue mug behind the stove.
Yuna covered her face with the red mitten. She did not cry at first. First she asked why the Chamber had meant to burn words like those along with the carriage.
No one could find an answer that did not sound like an excuse.
Dara lowered the peel.
"The passengers stay; the sparks do not enter homes without permission; you do not touch human heat. Break even one condition and we'll fill the stoves with salt ourselves."
Marek agreed.
Dara made him repeat the conditions before the residents as a plain list of actions: do not enter, do not take, do not open a vessel, obey the local cut-off. Then she assigned two stove-setters to watch Irsa and one child to count the sparks.
The child counted twelve and asked why one of them stayed closer to Marek.
"She was the first," he answered.
"So she's in charge?"
Marek remembered the two decisions Irsa had made on her own: after the thirteenth task she had broken the connection, and by the ventilation shaft she had stayed between the heat and Yuna.
"I don't know yet."
Dara heard the answer and nodded. In the Soot, people were more wary of those who never admitted how little they knew than of the ignorance itself.
He had taken only a few steps through the station when white light appeared in the tunnel. Oven had brought the Salt Guard sooner than Beran expected.
The captain stopped beyond the dismantled wall. The guards could not deploy in the narrow passage, and the people of the Soot took up position on the platform by the stoves.
Oven read out the Chamber's order: "Marek Sol is to be taken into custody; Irsa is to be surrendered for removal; Saya Renn is to be isolated pending trial; the passengers retain the status of 'not heard'. The district will not be closed if you comply now."
Oven's offer was a genuine bargain. He was not threatening to burn the Soot out of spite. He was offering to let the district keep its water, bread and medical steam if it handed over Marek, Saya and Irsa, while the seventy-two passengers remained stripped of the right to return to the city.
A murmur ran through the station. In the upper circle, a bargain like this would have been settled by one official's seal. Here everyone understood the cost personally. If the steam was cut off, the rooms by the outer wall would be cold by morning. If the pump stopped, the lower stoves would flood within a day. If coal was forbidden, the bread would run out before the Guard's salt did.
One of the stove-setters demanded that Marek be handed over. A woman by the infirmary answered that the Soot would be the next carriage. The argument quickly grew louder, but Dara did not call for silence. She let people speak their fear aloud so that the decision could not be passed off as unanimous.
Yuna stood beside her mother's vessel, trying to persuade no one and not crying. She merely kept the red mitten on the clay lid. That was enough to remind the people exactly whom they were being asked to return to the status of "not heard".
Dara looked at Marek.
"If we refuse, they'll close all of us?"
"Yes," Oven answered.
"And if we agree, will they release the passengers?"
Oven did not say yes.
Marek took out the incinerator indicator and threw it to the captain through the gap in the wall.
"Look again. The incinerator was switched on before the mark appeared. If you take us, ask Rador how he knew in advance which carriage he would declare infected."
Oven caught the device. He read the log for several seconds, then ordered his people to put away the sacks of salt.
"Do not use them until this has been investigated."
The guards obeyed, but the order lasted less than a minute.
A white line flared on the copper plate at Oven's throat. Rador had connected directly to the captain's seal.
"The decision has already been reviewed," said the First Keeper. "The captain is relieved of local command."
Oven touched the plate and immediately snatched his fingers back.
The old stoves in the Soot began to hum, but the white sound did not come from one direction. It passed through pipes, rails and bricks at once. It was the White Bell.
The first spark fell to the floor as grey powder.
Then the second.
The stove-setter who had recently demanded that Marek be handed over lunged for the nearest sack of salt, but Dara stopped him. Ordinary salt could sever an infected connection, but against the Bell it would only finish the forms off. Instead, the residents closed the dampers and muffled the pipes with wet blankets.
Beran struck the rail with his metal palm, trying to restore the track rhythm. Saya stretched the silver thread between two stoves. Oven tore the command seal from his breastplate, but the white note was already travelling through the stone itself.
Everyone tried to help in the way they knew. It was not enough.
Marek tried to hold the connections, but the Bell was not striking at bodies. It was erasing the common rhythm. The listeners forgot what they were searching for. The holders opened their grip. The carriers broke apart into separate flakes.
Within seconds, the connections on all twelve lines were severed.
Marek fell to his knees. Each of the eleven dead sparks left a missed beat inside him, and after the last connection broke, his heart stopped for an instant.
The grey powder lay around him in eleven separate patches. Not one reached towards the stoves or tried to gather itself again. Marek ran his fingers through the nearest patch, but the ash remained cold. The death of a form did not return its material. Everything the swarm had lost would have to be made again from new heat and new ash.
Only Irsa did not fall apart.
She lay in his palm, almost colourless. The cold form had survived the Bell not because she was stronger. She had not fully accepted the last command.
Rador declared the Soot a closed zone: the medical steam went out, the water pumps stopped, and white seals appeared at every exit from the district.
The residents surrounded Marek. Now he had no army, no proven strength and no way to protect those he had brought here.
Yuna stepped closer and knocked five times on the pipe with her red mitten.
Marek wanted to answer with a sixth knock, but his hand would not rise.
Then Irsa stirred.
In all that time she had not spoken a single human word. She had only carried the rhythm of tasks and broken dangerous connections.
Now the cold spark turned not towards Marek but towards the people of the Soot.
"They're breathing," she said.
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