She gave it a day.
That was the rule she had made the night before — observe before acting, let information accumulate until it could hold a conclusion — and she kept to it even though the waiting was its own kind of tension. She spent the day at Petra's, helping with the small tasks that were always available in a place that functioned the way Petra's did. Running messages across the quarter. Logging two new borrowers in the ledger in Shiloh's neater handwriting while Petra conducted the interviews herself, her voice level and thorough, extracting exactly what she needed and nothing more.
It was useful work. It was also a way of staying visible in a contained radius while she thought.
She thought about the box.
Small wooden container behind the counter of the paper stall. Gap between its presentation — private inventory — and its actual function, which her Resonance had registered as something else entirely without being able to name the something else. Faint. Not the vast deliberate construction she'd perceived in the Marked official. More like a thing that had been quietly wrong for long enough that the wrongness had settled into it.
She thought about what Petra had said. Small mysteries in the Underground usually connect to larger ones if you wait long enough.
She thought about the fact that someone had been cataloguing exceptions. Mapping anomalous Resonances across the district. Doing it quietly enough that most people hadn't noticed the shape of what was happening.
A box in a paper stall that presented itself as one thing and was another. In a market that ran all night, that sold things easier to explain in the dark, that existed in the gap between what the Underground officially traded and what it actually needed.
She went back the following evening.
The Lantern Market was different in the hours before full dark — less anonymous, more transactional. The night crowd hadn't arrived yet. The people here now were the ones who had specific business rather than the ambient browsing that the small hours produced. Shiloh moved through it at the pace of someone with somewhere to be, which was the pace least likely to attract attention, and found a position across from the paper stall with a reasonable sight line and nothing remarkable about her being there.
The seller was the same man. Unhurried, as before. He had a customer — an older woman examining something from the general stock, taking her time about it.
Shiloh watched. Her Resonance moved over the stall the way it always did, automatic, reading without asking permission. The box was still there behind the counter. The gap still settled around it like something that had been wrong for a long time.
She watched the seller. Still nothing false in him. He was exactly what he presented as.
Which was interesting. Because the box was on his side of the counter, behind him, and he had been here long enough to be a fixture — and if the box's function was something other than storage, either he knew about it or he didn't. If he knew, he was either complicit or coerced, and there was no gap in him to suggest either. If he didn't know, then someone had placed it there and was using him as unwitting cover.
That was the more alarming option and therefore the one she took most seriously.
The older woman completed her purchase and left. The seller reorganised his display without hurry. A boy ran past the front of the stall, pursued by another boy, both of them oblivious to everything except whatever they were playing. The Lantern Market smelled of cooking oil and candle wax and the particular dampness of the Underbelly in autumn.
She had been watching for twenty minutes when she noticed the other watcher.
He was across the market from her, at a different angle to the stall — a young man, perhaps a few years older than her, leaning against the wall of a grain merchant's with the posture of someone who had nowhere pressing to be. He wasn't looking at the paper stall. He was looking at the middle distance in the way that people looked at the middle distance when they were trying not to be seen looking somewhere specific.
Shiloh had learned that tell before she could read.
Her Resonance moved toward him automatically and found — nothing especially wrong. No large gap between surface and structure. He was presenting as exactly what he appeared to be: someone waiting, unremarkable, a young man with time to spend.
Which was itself worth noting. Because the particular quality of his stillness, the specific angle he had chosen, the fact that he had been there for at least the last several minutes without purchasing anything or moving toward a stall — that was the posture of someone watching. And he was watching the paper stall from a better angle than hers.
She observed him for a while longer.
He was good. Not perfect — the middle distance technique had a tell she'd identified, and his position gave him too clear a sight line to be accidental — but good enough that she was fairly sure most people in this market hadn't clocked him. He had a face that didn't ask to be looked at. Average height. The kind of clothing that existed to be forgotten.
She thought about her options.
The sensible option was to leave. She had confirmed the box was still there and still wrong, she had identified a second interested party, and she had no information about who he worked for or what his interest was. Adding herself to the situation without knowing more was the same mistake she'd made at the Pipe Market — getting closer when she should have stayed back.
She left.
She took a route that moved her away from the market and then curved back, which was longer but gave her a better sense of whether she'd acquired a follower. She hadn't, as far as she could tell.
As far as she could tell.
She was halfway down a lane that ran along the back of the Underbelly's second level — overhead walkways, buildings pressing together, the particular smell of a place where water collected and wasn't well drained — when she heard footsteps that were not quite right.
Not behind her. Ahead of her, and to the right, from one of the narrow cuts between buildings that she would have to pass to continue her route.
She stopped.
Her Resonance flared without asking. The cut between buildings resolved in her perception as a space that was presenting itself as empty and wasn't. Not a large gap. Not the Marked official's vast constructed distance. Just the specific wrongness of a concealed thing presenting as nothing.
Someone was waiting in the cut.
She had time to register this and then he came out of it — the young man from the market, not the middle-distance pretence now but direct and quick, and he had something in his hand that caught what light there was.
She moved before she thought about it. Left and back, putting distance between them, her Resonance firing on the lane around her the way it sometimes did under pressure — too much at once, wrongness bleeding in from every surface, the crack in the paving stone underfoot, the weakened joist in the walkway above, the building to her right with its old foundation presenting as solid with something underneath that wasn't. Too much. She couldn't sort it.
The young man came forward. Not rushing. He had the controlled movement of someone trained to it.
She had the controlled movement of someone who had spent years navigating the Underbelly at night and needed to be faster than people who wanted to hurt her.
"I just want to talk," he said.
"You have a knife," she said.
"So do you."
This was true. She had a small one, kept at her hip, that she had not reached for yet because reaching for it would commit her to something she was still trying to avoid.
Her Resonance was still giving her too much. The walkway above — the weakened joist — she couldn't stop perceiving it. Her attention kept snagging on it the way a tongue found a damaged tooth. Structural flaw, presented as sound. Old damage nobody had repaired.
She tried to focus.
"What do you want," she said.
"Same thing you do, I think." He had stopped at a distance she judged as just outside immediate lunge range. He hadn't put the knife away. "You were watching the paper stall."
"I was browsing the market."
"You weren't browsing anything. You were reading the stall from across the market for twenty minutes without looking at a single piece of merchandise." He tilted his head slightly. "You can see something wrong with it, can't you."
The directness of it landed strangely. She kept her expression even.
"I don't know what you mean," she said.
"I think you do." He said it without aggression. Almost careful. "I've been watching that stall for two weeks. I haven't been able to work out what it's being used for. You clocked it in one pass." He paused. "What did you see."
Her Resonance was still flooding. The walkway above. The joist. Presented as sound. She made herself stop pulling on it and focus on the young man in front of her.
No large gap. But something she hadn't caught at the market — a small, controlled wrongness, not in his presentation but in his purpose. He was presenting this encounter as information exchange. That part was true. There was something else underneath it. A secondary interest she couldn't fully read.
"Who sent you," she said.
"Nobody sent me."
The gap didn't shift when he said it. Which meant either it was true or he was skilled enough to hold his gap stable under direct questioning, and she had no way yet of knowing which.
She took a step back. "I'm leaving."
He moved to the left — not blocking, not aggressive, but repositioning in a way that changed the geometry of the lane. She read the movement and moved right in the same moment, creating distance.
And then her Resonance snagged on the walkway above with a force she couldn't push past.
It happened in a compressed sequence. She was watching him. Her Resonance was on the joist. He stepped forward, just slightly — testing the new distance. And her mind, already overloaded, already pulling on too many things at once, made a connection she hadn't consciously constructed.
His position. The walkway above. The joist. Presented as sound.
She didn't think it through. She just acted.
She grabbed the nearest thing — a loose piece of roof tile leaning against the wall, left there by someone's unfinished repair — and threw it at the walkway's edge. Not at him. At the section of decking directly above where he was about to be.
The joist gave.
Not catastrophically — this wasn't the gangway bolt, this was old wood and dry rot, and what happened was a section of decking about a forearm's length cracked and sagged and dropped a small avalanche of debris down into the lane. Not enough to hurt him badly. Enough to scatter across his feet and make him stumble back.
She ran.
She was around the corner at the end of the lane before he recovered. She took three more turns in rapid succession, none of them the natural route, and came out into a wider street where there were people and lit windows and the ordinary sounds of an evening in the Underground.
She walked. Controlled pace. Breathing through her nose.
Her shoulder was aching again from a contact she'd barely registered in the lane. Her Resonance was still giving her too much, still threading wrongness in from every surface, and she couldn't tell anymore whether that was because there genuinely was wrongness everywhere or because her perception was fraying at the edges from the stress of the last two days.
She thought about what had happened.
She had gathered no information about the box. She had confirmed there was a second party with interest in the stall, had failed to identify who he worked for, and had fled a conversation that might have produced something useful. In exchange she had revealed — again — that she could perceive things other people couldn't. To someone she didn't know. Who had been watching the stall for two weeks. Who now had her face and her ability and a lane in the Underbelly where he'd come very close to cornering her.
She had not won that encounter. She had survived it, which was different, and the difference mattered.
The walkway. She hadn't planned that. Her Resonance had snapped onto the weakness and she had acted on instinct without fully understanding what she was doing, and it had worked. This time.
That was not a strategy. That was luck dressed up as perception, and she needed to be honest with herself about which was which.
She kept walking. The Underground moved around her, alive and indifferent, full of things presenting as one thing and being another.
Somewhere behind her, a young man with a knife and no name was recalibrating. She could not tell if that was more dangerous than him having written her off entirely.
She suspected it was.
She went back to Petra's by a different route than the night before, and a different route than the obvious alternative, and she took longer than necessary and paid attention to every shadow with any business being the shape it was.
Petra was at the table when she came in. One look, and she set down her pen.
"Sit," she said.
Shiloh sat.
She told her. All of it, in the order it happened, without editorialising. The watcher at the market. The lane. The knife. The joist. The escape.
Petra listened the way she always listened.
"The box," she said, when Shiloh finished. "Did you learn anything new about it."
"No," Shiloh said.
Petra nodded, slowly, as if this confirmed something.
"The person watching," she said. "Two weeks."
"That's what he said."
Petra was quiet for a moment. Then: "Someone placed that box in that stall. Someone has been watching it to see who else notices. And now they know you noticed." She looked at Shiloh steadily. "That's twice in two days that someone has learned what you can do."
Shiloh said nothing.
"Petra," she said, after a moment. "The person cataloguing exceptions. The one you said was asking questions."
"Yes."
"Is it possible they already know about me. Not from last night. From before."
Petra was quiet for slightly too long.
"It's possible," she said. "The western quarter is not a large place and you have never been unnoticeable, Shiloh, whatever you think."
She said it plainly, which was the only way Petra said anything. It wasn't unkind. It was information.
Shiloh sat with it.
Outside, the Underground kept moving. Somewhere in the market networks, something was watching. Taking note of exceptions. Mapping what shouldn't exist according to the system that had decided what should.
She thought about the young man's question. You can see something wrong with it, can't you.
She thought about the fact that he'd been watching for two weeks and hadn't seen what she'd seen in one pass.
She thought about what that meant.
It meant she was useful. Which was not the same as being safe. In the Underground, in her experience, being useful and being safe were frequently opposite conditions.
She filed it next to everything else and tried to decide which thread to pull next.
There were too many threads. That was the problem. Too many things presenting as one thing and being another, and her Resonance couldn't sort them all at once, and sorting them wrong had consequences she was beginning to understand the shape of.
She would have to be more careful.
She would have to be faster.
She was not sure she could be both at once.