[Radio Station — Day 80, 0411]
Raven Reyes — 3rd close
The cipher broke at 0411 and Raven did not shout because she was alone and shouting would have brought Wick in from the adjacent bay.
She had been at the bench for twenty-six hours. Not continuously — she had eaten three times and slept ninety minutes in the chair at 0100 when the hardware approach had stalled on the third iteration. At 0215 she had stopped looking at the hardware and started looking at the math, which was what she should have done twelve hours earlier and had not done because Bellamy's call-sign cipher was built on a hardware key and she had assumed the Mountain's encryption would be too.
It was not. The Mountain was old-world engineering — classical encryption built on number sequences, not hardware randomization. Bellamy's call-sign was the prime seed. She had been feeding it to the hardware decoder, which was the wrong instrument for a prime-sequence cipher. She had fed it to the mathematical solver at 0302.
The cipher had broken at 0411.
The schematic came up in segments — structural layers, floor-by-floor, the Mountain's full interior architecture resolving from fragments into a document that the radio had been collecting piece by piece since the first western signal in Ch.35. It was not a map so much as a ledger: every level named, every section coded, every ventilation path, waste system, and internal communication channel catalogued in the administrative language of a facility that had been running continuously for ninety-seven years.
Level 1: residential and civic. Level 2: medical (standard). Level 3: agricultural (their version). Level 4: security and infrastructure.
Level 5.
Raven stared at Level 5 for thirty seconds.
The label was not a number in the Mountain's administrative system. It was a designation: Sub-level C. Restricted access. Ward classification: Marrow. The layout was a series of chambers, each one sized for two or three beds, the ventilation running separate from the main building loop — a closed-circuit system, filtered to prevent biological contamination outward.
Bellamy's report had given them Levels 1 through 4 in complete detail. Level 5 was not in his report.
She wrote it on the first clean sheet of bark paper she could reach.
Then she went to the controlled-leak analysis.
The gate-17 gap was already flagged — she and Ethan had caught that in Ch.48. She had been running the other two data points since Day 72. The guard rotation: Cage had given them a twelve-minute window at a specific shift exchange. She ran the shift exchange against the structural timing of the schematic and found the break. The rotation held for forty-one hours and then reset — a twelve-minute gap followed by a forty-minute guard overlap, a funnel that compressed a twelve-minute window into something tight enough to catch any team that had used the first window to get in and needed a second window to get their people out.
"He wanted us at minute forty-three," she said aloud. To no one.
The south-vent timing was different. Cage had given them a ventilation schedule — the Mountain's air-handling system, which ran on a fixed mechanical cycle tied to the building's power generation. The schedule he had sent was thirty minutes off the actual mechanical cycle visible in the structural schematic. Not a tactical lie — a forgotten detail. The ventilation was mechanical and Cage had not thought to falsify it because mechanical systems didn't feel like intelligence.
He had accidentally confirmed the real schedule by trying to hide it.
She circled the real south-vent timing on the schematic.
At 0547 her left arm went to the pins-and-needles that meant the compensation had been running too long — the shoulder working for the hip working for the knee, the chain that she had been maintaining for months, the cost of the damaged LCL making its periodic billing-run. She put the arm down. Rotated the shoulder. Waited for it to pass.
It passed in three minutes, which was faster than last month.
She went back to the schematic.
Ethan came in at 0600 with two ration bars and a thermos of the herb tea that Harper had been improving since someone had figured out the second steeping process. He looked at the schematic on her bench — the full printout, five sheets of bark paper with her annotations — and sat in the chair he used when he was at her bench without being at her bench, the chair that was positioned exactly one working-width away from the bench itself so he was close enough to hand tools without being in the physical space of whatever she was doing.
He opened the thermos. Set a cup beside her without asking.
She took it.
"The cipher is Bellamy's call-sign as a prime seed," she said. "Classical number-sequence, not hardware. I had the wrong decoder for twelve hours."
"Is the hardware decoder salvageable for other uses?"
"Yes. Write it in the Designs Ledger under error-class tools." She pointed to the schematic. "Level 5."
He read it.
"Bellamy didn't see this."
"He didn't see it or he saw it and they closed the door before he got the layout. Either way—" She drank the tea. Hot. The first genuinely hot thing she had put in her body in twenty-six hours. "He isn't going to tell us before he gets out. The level is too deep; his signal won't carry it and he won't risk paper."
"What's the access pathway?"
She showed him the schematic. Level 5 ran under Level 4's infrastructure bay, accessible from two internal points and one external — the external being a service shaft that connected to the Mountain's waste-system, which connected to an external pipe that the Mountain's engineers had run under the ridge, which came up in a ravine approximately three hundred meters north of the Mountain's primary entrance.
Ethan looked at the waste-system connection.
"We can get someone in from the north ravine without using any of Cage's guard-rotation windows," he said.
"Yes."
"That path isn't in his controlled leak at all."
"No. He didn't protect it because it's through the waste system and he thought we'd find it unusable." She tapped the south-vent circle on the schematic. "If we go in through the south vent on the real mechanical schedule — not the one he gave us — we can gas the Level 5 corridors before anyone on Level 4 knows the south vent is active."
"What gas."
She looked at the adjacent bay.
"Monty," she said. "Not me."
She leaned her stick against the bench frame, pushed herself up, and walked to the partition.
---
Monty was at the partition with his agriculture journal already open, which meant he had heard her voice and had known the moment was coming. He was not performing the readiness — he had genuinely been waiting, with the patient competence of someone who had been sitting on a relevant piece of information since the swamp survey six weeks into the landing and had been watching the problem develop toward the moment when the information would fit.
He put the journal on her bench.
"The swamp survey," he said. "There's a plant in the eastern marsh that releases a chlorine-mimic compound when burned. Not chlorine — a biological analogue. Doesn't kill in low concentration. In high concentration, it disables motor function for approximately forty minutes per exposure."
Raven looked at the south-vent pathway on the schematic. The vent ran from the external intake down into Level 5's closed-circuit loop. If the air handler was loaded with the burning plant material at the real mechanical cycle — the forty-minute exchange, not the thirty-minute offset Cage had given them — the compound would cycle through Level 5's circuit twice before the system auto-purged.
"Harvest?" she said.
"There's enough in the eastern marsh for two full burn-loads." Monty turned the journal to the botanical page. "I logged the species and location in week four of the survey. I wasn't sure what it was for until I heard Ethan say 'Level 5 access.'"
Ethan had not said Level 5 access. He had said what's the access pathway. Monty had been listening through the partition and had heard what the question was really asking.
Raven looked at him.
He looked back with the expression of someone who had been told once that his chemistry aptitude was being tracked but had never been told who had filed the notation, and who suspected it had been Ethan, and had decided to be the kind of person that notation described rather than ask about the filing.
"Designs Ledger," Ethan said from behind her. He was already at the bark paper.
"Entry number six," Monty said. "I know where I go."
[+800 XP — Diplomacy III qualifying beat + SPM partial: Mountain schematic operational]
⚜ ━━━━ ROYAL PROCLAMATION ━━━━ ⚜
Read more chapters for free in the public library:
unwrittenrealm.com
⚜ ━━━━━━━━━━━━━━━━━━━━━━━━━━ ⚜
By order of the Crown.
The royal vault holds chapters the public throne room has yet to receive. Those who pledge fealty on Patreon may read ahead of the realm:
Noble — $7 — Twelve chapters ahead.
Royal — $11 — Nineteen chapters ahead.
Emperor — $17 — Twenty-six chapters ahead.
New chapters added weekly. Full schedule posted in the war room.
patreon.com/Kingdom1Building
Long live the Kingdom.