Petra's place was three rooms on the top floor of a building that had once been a textile warehouse, back when the western quarter had textile warehouses, back when the western quarter had been considered worth the investment of textile warehouses. That was before Shiloh was born. The industrial bones of it were still visible if you knew where to look — the width of the floor beams, the iron hooks still bolted to the ceiling at regular intervals, the particular height of the windows that had been designed for ventilation rather than light.
Petra had made it something else. That was what Petra did with things.
Shiloh knocked twice and then once, which was the code that meant it's me and I'm alone and I'm not being followed, and listened to the footsteps cross the floor and the bolt slide back, and then Petra was there in the doorway with a candle and an expression that said she had not been asleep.
She looked at Shiloh for a moment. Took in the state of her — the dust from the passage walls, the shoulder that was being held slightly wrong, the particular quality of exhaustion that came from a night that had been too much.
"Come in then," she said.
That was Petra. No performance of concern. Just the door open.
The room Shiloh slept in when she stayed here was small and had a narrow cot and a window that looked out over the rooftops of the Underbelly toward the eastern edge of the quarter. She had slept in it enough times that her body knew it — knew the specific sag of the cot, the way the draught came through the window's bad seal and moved across the floor rather than the ceiling, the sounds of the building settling in the small hours.
She didn't sleep well anyway. She lay on her back and watched the dark and let the night's information move through her head without trying to organise it, which was something she'd learned was sometimes more productive than forcing it into structure. Let it sit. Let the connections make themselves.
They didn't. She was too tired and too wired in equal measure and the connections kept starting and stopping like a badly maintained lamp.
She slept eventually. She knew she did because there was a gap in the dark and then there was grey light coming through the window and the smell of something being cooked and the sounds of Petra's morning, which had a particular rhythm Shiloh had learned so long ago she couldn't remember learning it.
She lay still for a moment and let herself have it. The sounds. The smell. The grey light on the ceiling of the room she'd been sleeping in since she was small enough that the cot seemed large.
Then she got up.
Petra was at the stove when Shiloh came through, two pots going at once, moving between them with the economy of someone who had been cooking in this kitchen for twenty years and needed to spend no attention on it. She was a broad woman, Petra, somewhere in her mid-fifties, with grey threaded through dark hair she kept pulled back and hands that had done enough work to look it. She had a face that didn't waste expression. When she looked at you fully it felt like being examined by something that had been practising its whole life.
She looked at Shiloh, noted the shoulder, noted whatever else she noted, and nodded toward the table.
Shiloh sat.
"Tell me," Petra said. Not a question.
So Shiloh told her. All of it, in the order it happened, without editorialising. The Pipe Market. Cael and the Marked official. The wrongness she'd perceived — the gap that had no right being that large. Dael. The men following her. The gangway. The paper stall at the Lantern Market, the box that presented itself as storage and wasn't. Cael again, afraid.
Petra listened the way she always listened. Like she was filing it.
"The official," she said, when Shiloh finished. "The gap you perceived. How wide."
"Wider than anyone I've seen. It wasn't — " Shiloh tried to find the right shape for it. "It wasn't that he was lying in the moment. It was that everything about his presentation was constructed to be something he wasn't. Like the gap had been there so long it had become structural."
Petra was quiet. She stirred one of the pots.
"I've seen something like that," she said. "Twice, in thirty years."
This was the thing about Petra and Resonances. She knew more than most Hollow did — not because she had one herself, hers had never manifested in any form she'd identified — but because she ran a lending operation, which meant she read people for a living, and thirty years of reading people produced a particular kind of knowledge. Not knowledge with a source you could name. Pattern recognition that had forgotten it was pattern recognition and started feeling like instinct.
"Who," Shiloh said.
"People who came through here. Borrowers, both of them, years apart. I do a thorough assessment before I extend credit — you know that." Petra set down the spoon. "I couldn't read either of them cleanly. Not because they were lying in the moment. Because everything about how they presented themselves had been built. Layer on layer, over a long time. Like scar tissue." She paused. "I thought it was something a person learned. A discipline. Something you developed if you'd had enough reason to."
"And now."
Petra looked at her. "Now you're telling me you perceived the same quality in a Marked official you'd never met before, at full strength, from thirty feet away. Which means it wasn't learned. Or not only learned." She picked up the spoon again. "Whatever it is in him, it runs deeper than practice."
Shiloh absorbed that.
"Dael sent men after me," she said.
"I know."
"You know."
"Word moves." Petra brought two bowls to the table and sat across from her. "Word about you specifically has been moving since last night. That's the thing about revealing your Resonance, Shiloh. It's not something you can un-reveal."
Shiloh looked at the bowl. Porridge, something added to it she couldn't identify, one of the ways Petra made the cheap things taste like something worth eating.
"Dael's arithmetic," she said. "What is it adding up to."
"Dael keeps the western quarter functioning by making sure nothing in it is interesting enough to draw attention from above. A Hollow with an unclassified Resonance is interesting. You've always been interesting, which is why he's always kept a distance from you. Last night you stopped being manageable interesting and became inconvenient interesting." Petra picked up her spoon. "He's not your enemy. But he's not your advocate either. Don't expect him to be."
"The men he sent—"
"Observation, most likely. Not harm. Dael doesn't cause harm when observation will do the same job at less cost." Petra paused. "The one who fell — that wasn't your fault."
Shiloh said nothing.
"It wasn't," Petra said, without inflection, which was more convincing than if she'd softened it. "You didn't loosen that bolt. You made a decision in three seconds that kept you alive. That is what you're supposed to do."
"I know," Shiloh said.
"Then eat and stop carrying it on your face."
She ate. The porridge was good. The thing added to it was dried fruit of some kind, reconstituted, slightly sweet. Small and deliberate, the way Petra's kindnesses always were. Never announced. Just present, if you looked for them.
This was the thing about Petra that Shiloh had spent years learning not to mistake. She cared. The care was real. But it was distributed across the forty-odd people who moved through these three rooms regularly, who slept on this floor and ate at this table and came to Petra when the Underground had ground them down past the point of managing it alone. Shiloh was not a special case. She had needed to understand that clearly, and she did understand it, and understanding it didn't entirely close the particular gap it left.
She had stopped expecting it to.
"There's something else," Shiloh said. "At the Lantern Market. I bumped into a boy."
Petra's expression didn't change. "A boy."
"My age. My Resonance went for him automatically and what it found was — " She tried again to find the word. "Not deceptive. Nothing he was presenting was false. But all of it was constructed. Deliberately assembled. Every surface of him was the result of a decision."
"Hm," Petra said.
"I've never perceived a person that way."
"No. You wouldn't have." Petra looked at her bowl. "That kind of self-construction — that comes from loss, usually. Someone who had to rebuild from the ground up and chose to do it consciously." She was quiet for a moment. "Your Resonance reads it as structural because it is. It's not deception. It's architecture."
Shiloh turned that over. It fit. It fit exactly the shape of what she'd perceived.
"Who is he," she said.
"I don't know." Petra looked up. "But if your Resonance flagged him and couldn't name the gap, I'd pay attention to that. Your Resonance doesn't misfire on people. It misfires on situations, on contexts it doesn't have the framework for yet. A person it can't read clearly — that means something."
Shiloh filed it. She'd been filing things since last night. The folder was getting heavy.
"What should I do," she said. Not a question she asked often.
Petra considered it seriously, which was why Shiloh asked it at all.
"Stay away from Dael for now. Not because he's dangerous but because anything you give him becomes information and you've given him enough." She stood, took her bowl to the basin. "The Marked official — don't pursue that alone. Not yet. You don't have enough to know what you're walking into." She turned. "And the box in the paper stall. That one I'd watch. Small mysteries in the Underground usually connect to larger ones if you wait long enough."
"And Cael."
Petra's expression shifted slightly. Something careful moved through it.
"Cael is frightened," she said. "Frightened people are unpredictable in ways that calm people aren't. Give him space."
There was something she wasn't saying. Shiloh's Resonance didn't fire — Petra's gap was small and old and Shiloh had learned its shape years ago — but she knew the texture of a thing being withheld. She let it go. There were reasons Petra withheld things that weren't about distrust. Sometimes it was protection. Sometimes it was that the information wasn't solid enough yet to hand to someone else.
She trusted that. Or she had decided to trust it, which was the closest she could get.
"There's something moving," Petra said, and her voice had changed slightly. Quieter. The register she used when she was choosing words carefully. "Through the market networks. Not a rumour — something more structured than that. Someone has been asking questions, the last few weeks. Specific questions about anomalies. Hollow with unusual Resonances. People whose abilities don't fit the standard classifications."
Shiloh went still.
"How long," she said.
"Longer than last night. Which means last night wasn't the start of whatever this is. It was just the first time you stepped into it." Petra looked at her with the full weight of that examining expression. "Someone is cataloguing exceptions. Mapping the gaps in the system, you might say. And they're doing it quietly enough that most people haven't noticed they're being watched."
The room was quiet except for the sounds of the building and the far-off noise of the quarter waking up. Somewhere below them a door opened and closed.
"Who," Shiloh said.
"I don't know yet," Petra said. "But I'm looking."
She said it the way she said most things. Level. Already moving on to the next calculation.
Shiloh sat at the table in the grey morning light and understood that last night had not been the beginning of anything. It had been the moment she walked into something that had already been in motion. That the Marked official and Cael and Dael's men and possibly the box in the paper stall were all threads of the same thing, and the thing was larger than the western quarter, larger maybe than the Underground, and she had stepped into it because her Resonance had snagged on a gap across a market and she had gotten closer instead of walking away.
She thought about that choice. Whether she'd make it again.
She probably would.
"You can stay another night if you need it," Petra said, from across the room. Already at something else. One of the ledgers she kept for the lending operation, making a note in her precise, small handwriting.
"Thank you," Shiloh said.
Petra nodded without looking up.
That was all. It was enough. Shiloh had learned to measure it correctly — not against what she wanted, which was something larger and warmer and less distributed, but against what Petra actually had to give and the fact that she gave it.
It was enough.
She watched the grey light on the table and thought about threads and boxes and a boy who read like a building rather than a person, and outside the window the Underground kept waking up, indifferent and alive, carrying its own weight the way it always had