Chapter 215: Fourteen Silent Metres
Sector E-9 was colder than the schematic had suggested, and longer.
Jin walked it end to end before he did anything else. A hundred and ten meters should have taken less than two minutes; stopping at every forty-year-old patch repair stretched the inspection to four. The reinforced channel had been driven through infrastructure older than the shelter’s outer works, with a poured foundation slab running down its spine.
The eastern branch came in low and enclosed. He had to duck twice.
The western branch was broken stone over collapsed service tunnels, and about a third of it was rubble that shifted when he stepped on it.
Eight seconds from the join to either end at a run. That’s the sector.
Lysa was at the eastern anchor faces with her notebook out when he got back.
"You’ve read the map," she said, not looking up.
"Twice."
"Then you know I get four faces." She tapped the second one, which had a fist-sized crater in it from something years ago. "This one’s damaged. I want it repaired before deployment. Is that yours to approve?"
"No. That’s engineering."
"Then submit it."
"I’ll submit it. They may say no." Jin pulled up the sector orders. "Do you want the numbers?"
"That’s why I’m standing here."
He read them out. Expendable web allowance, replacement supply, maximum safe tension per anchor, retreat trigger, resupply interval during active defense.
Lysa wrote all of it down and then said, "That allowance is about sixty percent of what I’d want."
"That’s the published figure."
"I know it’s the published figure, I’m telling you what it means." She closed the notebook. "It means I can build one good boundary and rebuild it once, or three cheap ones and rebuild none of them. You should know that before you assume I can hold the east indefinitely."
"Understood."
"Also." She turned around properly for the first time. "The roster gave you authority over the sector. It didn’t give you my Spider."
"I know."
"Some people need to be told."
"You’ve told me," said Jin. "You own the east. I define the objective and the boundary and then I stay out of it."
Lysa looked at him for a second, then went back to her anchor faces.
Glitch mapped the ground while they worked.
He worked it in stages down the length of the sector, stopping every few meters, dropping his weight, holding still. What came back through the bond was not a picture and never had been. It was texture: the clean continuous return of good slab, the muddier return where the patch repairs sat, the depth of the buried infrastructure beneath.
Jin walked beside him and translated as they went.
"Slab’s good the whole spine. Reads all the way to both ends."
"Useful," said Lysa, from the east.
"East branch is connected. He can feel your anchor faces from the join."
"That’s better than I expected."
The west was where it stopped.
They used the inspection team’s weighted test drop — a forty-kilogram block on a winch that could be dropped at marked intervals to check foundation integrity. Jin had them run it down the western branch at ten-meter stations while Glitch lay on the slab at the join.
Station one: clear.
Station two: clear.
Station three: weaker, muddied by the cracked surface.
Station four: nothing at all.
Jin had them repeat it twice before he accepted it.
"Again at four."
The block dropped. Glitch’s report came back as an absence — not a faint return, not a distorted one. Nothing arrived.
"Station five."
Clear. Not perfectly clean, but there.
"Six?"
Clear.
Jin stood on the slab and looked down the western approach and understood exactly what he had.
Fourteen meters, roughly, from station three to station five. Anything in that stretch is invisible.
He checked the engineering notes and it took about ninety seconds to confirm the bad news. The disconnection was not a surface crack. The collapsed tunnels underneath had separated the whole section from the foundation’s deeper layers, and pouring new surface over the top would give him a floor that looked continuous and transmitted nothing.
"Can they fix it in six days?" Lysa asked.
"No. And if they poured it I’d have a blind corridor that I couldn’t see was blind, which is worse."
Lysa came and stood at the edge of the amber section with her arms folded for about a minute.
"I can’t web that," she said. "There’s nothing to anchor to and it’s the wrong shape."
"I know."
"But I don’t need to web it, do I? You don’t want it restrained. You want to know when something comes out of it."
Jin turned.
"Go on."
"Cheap strands. The sacrificial stuff, not the load lines." She was already walking the ground. "Across every place a burrower can reach the surface, and across the three exits at the far end. Low. They cost me almost nothing and they break if a bird lands on them."
"What do they tell you?"
"Nothing while it’s underground." She said it flatly, without softening it. "They don’t sense depth and they don’t sense direction of travel. If a strand breaks, I know something crossed the surface at that point. I don’t know what, how big, how many, or whether there are three more still down there."
"That’s not much."
"It’s what exists," said Lysa. "You’d rather I invented something?"
"No." Jin looked at the amber stretch. "Design it. Place them where you want them within your allowance and don’t ask me about positions. I’ll want the strand numbers on the map."
"You’re not going to tell me where to put them?"
"You’ll do it better than I would."
She wrote that down, which Jin found unnerving.
They tested it with the weighted block, dragged on the winch line through the western branch at walking pace.
Glitch tracked it at station three. Then the reports thinned and stopped.
For eleven seconds the block existed nowhere at all.
Then a low strand snapped at the western exit and Lysa said, "Strand four. Broke outward."
"Direction?"
"Outward’s all I’ve got. That’s the strand’s whole vocabulary."
Jin wrote the system down on the sector map in three layers, because he had learned that anything he could not write in three lines he could not say on a comm channel.
Last confirmed: the final Tremor Sense position before the blind section.
Projected blind route: last heading and pace, carried forward, with a time window.
Web-confirmed reappearance: strand number and break direction.
"That’s honest," said Lysa, reading it over his shoulder. "It doesn’t say secure anywhere."
"It isn’t secure."
"Most people would have coloured it green and told command it was handled."
"Then command would move Runner somewhere else," said Jin, "and I’d find out I was wrong in about four seconds."
He used his second advanced-room session that afternoon on a joint drill, which was not what the booking system expected and which nobody stopped him from doing.
The room had connected flooring and a moving training target on rails, and Lysa brought enough web to build one boundary across the far third of it.
The first attempt went badly and it was his fault.
Glitch picked up the target at nineteen meters and Jin relayed it — direction, pace, confidence — and that part worked. Then the target reached Lysa’s boundary and Jin said, "It’s angling left, take it on the outer—"
"Astor."
"—line before it—"
"Astor." Lysa’s voice cut across him. "I either own the boundary or I don’t. Which is it?"
Jin shut up.
The Spider caught the target four seconds later on a pattern Jin would not have chosen and which worked better than his would have.
"Say that again," he said afterward.
"Which part?"
"The part where you asked me which it was."
"I own the boundary or I don’t." Lysa reeled line back onto a spool. "You gave me the east. Then you gave me a capture instruction. Both of those can’t be true and I’d rather find out in a training room than out there."
The second attempt, Jin gave her the contact, the pace, and the confidence level, and then stopped talking entirely.
The Spider took it in nine seconds.
He did not ask for anchor numbers, and Lysa noticed that he had not, and said nothing about it, which Jin took as the closest thing to approval he was going to get.
The updated E-9 layout went up that evening.
[SECTOR E-9 — DEFENSIVE LAYOUT, REVISED]
[Eastern branch: local authority — PELL, L.]
[Western branch, stations 3–5: BLIND CORRIDOR — no vibration continuity]
[Western surface monitoring: expendable strand array, 11 positions]
[Expendable web allowance: released]
[Runner standby: relocated to join, rear]
Nobody praised him for it. The academy accepted the revised layout, released Lysa’s allowance, moved Runner’s standby position eleven meters, and returned the engineering request on anchor face two marked approved, scheduled day 5.
Jin looked at the amber stretch on the map for a while.
Fourteen meters where a beast could go in and stop existing.
Six days of preparation and I haven’t removed it. I’ve just put a fence around it and given it a name.
That, he suspected, was what most preparation actually was.