Sable closed early on Thursdays. Marcus had learned this the way he learned most things about the city, by showing up and finding the door locked and asking about it later. She never explained. Nobody who knew her expected her to.

  He found her on a Thursday afternoon anyway, not in the shop but at a food stall two streets over, eating something that smelled like charred pepper and smoked river fish and looked like a war crime committed against a flatbread. Drake food. The vendor was a young drake woman with bronze scales darker than Sable's, working a grill that radiated heat like a furnace and didn't seem to bother either of them.

  "That's going to kill you," Marcus said.

  "I'm ninety-three," Sable said. "If spice were going to kill me, it would have managed by now." She looked at him. "You're not on shift."

  "Rest day."

  "You don't rest. You wander and worry. Sit down."

  He sat on the low bench beside her. The stall was on a corner where the market district met the lower terraces, a seam between two versions of the city. Up the street, shop fronts with painted signs and window displays. Down the street, tenement doors and laundry lines and the faint persistent smell of canal water that lived in everything below the third terrace.

  Sable ate. She ate the way drakes ate, which was with focused attention and no particular interest in conversation during the process. Marcus watched the market traffic, the mid-afternoon lull when the morning's business was done and the evening's hadn't started. A halfling woman was carrying a basket of what looked like river herbs, the long-stemmed kind that grew along the canal banks and smelled faintly of pepper when the wind caught them. Two stone people were having a conversation outside a building supply shop, their voices a low rumble that he could feel as much as hear.

  "You haven't asked about the shoes," Sable said.

  "What?"

  "The shoes. The ones you traded me your first day. The Earth-leather ones." She wiped her hands on a cloth napkin. "You haven't asked what I did with them."

  He hadn't. It was true. The shoes had been the currency of his survival, the trade that had gotten him local clothes and Sable's name as a reference and, eventually, a room at Grainer's and a place on a canal crew. He hadn't thought about them since the first week.

  "What did you do with them?"

  "Sold them. To a collector. An elf named Farren who keeps a shop in the upper market, specializes in unusual materials." She folded the napkin precisely, the way she did everything, with an economy of motion that wasted nothing. "The leather was unlike anything available in the region. The stitching pattern was unfamiliar. The sole construction used a material he'd never seen. He paid well."

  "How well?"

  "Well enough that the difference between what I gave you in trade and what I received in sale was significant." She looked at him directly. "I told you the trade was fair. It wasn't. It was heavily in my favor. I knew it at the time."

  Marcus considered this. The market moved around them. A vendor across the street was arguing with a customer about the freshness of something in a jar. The argument had the practiced quality of a negotiation disguised as conflict.

  "I didn't have options," he said. "You did. That's not unfair. That's economics."

  "It's economics from the perspective of someone who came out behind." She picked up the last of her flatbread. "I'm telling you because the shoes traveled. Farren showed them to clients. One of those clients was the wife of a man named Dorran Haele."

  The name landed differently now than it would have a week ago. Before the locked gate. Before the flow diversion. Before Thessaly's story.

  "She bought the shoes?"

  "She didn't buy the shoes. She asked about them. Where they came from. What species of animal produced the leather. Farren told her what I told him, which was that they came from a foreigner who'd arrived recently and traded them for local clothing. He didn't have your name. I hadn't given it." Sable ate the last bite. "But she asked. And in certain circles, asking is the same as knowing, and knowing is the same as watching."

  He sat with that. The afternoon light was warm and the market smelled like grilled food and the herbal soap the laundry two doors down used in their water. It was a good afternoon. It was the kind of afternoon where you could believe the city was just a city, doing what cities do, and not a system of pressures and levers operated by people who knew which levers to pull.

  "Is that why Fennis showed up?" he asked.

  "Fennis showed up because you were assigned to inspect the section of canal his employers use for trade routing. But yes. The shoes were part of it. You were interesting before you were inconvenient. The shoes made you interesting. The inspection route made you inconvenient. Now you're both, and that combination draws a particular kind of attention."

  She stood up from the bench. She was tall for a woman, taller than him by an inch, and she moved with the controlled economy of someone who had been navigating human-scaled spaces for decades without ever quite fitting into them. Her shop, her stool, her cutting table were all built to drake proportions. Out here, she adapted without comment.

  "Walk with me," she said. It wasn't a request.

  They walked through the market district and down toward the canal. Sable moved at a pace that suggested she had a destination and no intention of explaining it until they arrived. Marcus walked beside her and noticed, not for the first time, the way people reacted to her. Not with fear or deference but with recognition. A nod from a cloth merchant. A wave from a halfling running a dried-fish stall. A stone person woman who said something in a language Marcus didn't know, and Sable answered in the same language, two words that made the woman laugh.

  "You speak Karthic," Marcus said. Karthic was what the stone people's language was called, or what the surface approximation of it was called. He'd heard Kael use it once, with his sister.

  "I speak enough to be polite. Stone person customers appreciate it when the alternative is being spoken to slowly in common by someone who assumes they don't understand it." She turned down a side street that ran parallel to the canal. "My mother spoke it fluently. She learned it during the migration period, when the first Holds were settling in the lower district. She sold them fabric at fair prices when other merchants were charging double because the certification forms didn't have a checkbox for stone person trade qualifications and nobody was in a hurry to add one. It was good business, and it was right, and she didn't see a difference between those two things."

  The side street narrowed. The buildings here were older, the stone darker, the windows smaller. They were below the main market level now, in the transition zone between commerce and the waterfront industrial district. The canal was louder here, the sound of water and mechanism filling the spaces between buildings.

  Sable stopped at a doorway. It was a narrow door in a narrow building, with a symbol carved into the lintel that Marcus didn't recognize. Not text. A geometric pattern, precise and repetitive, like something between a knot and a wave.

  "This was my mother's office," Sable said. "Before the shop. She ran a textile sourcing operation out of this building for twelve years. Upstream contacts, downstream sales, three cities along the canal route." She looked at the door. "The old families shut her down. Not dramatically. They just made canal access progressively more expensive for independent operators until the margins disappeared. It took four years of slow strangulation. She moved to the shop and started doing alterations and retail because it was the only business model that didn't require canal shipping access she couldn't afford."

  She didn't touch the door. She just stood and looked at it, and for a moment Marcus saw something in her expression that he hadn't seen before. Not grief. Something older and harder, the way stone is harder than grief because stone doesn't pretend to be anything else.

  You could be reading stolen content. Head to Royal Road for the genuine story.

  "Why are you showing me this?" Marcus asked.

  "Because you need to understand what the canal means to the people who live along it. Not the engineering. You understand the engineering better than anyone I've met in thirty years. You need to understand the rest." She turned away from the door. "Come on."

  She took him to Kettle Dock.

  He'd been near it before, on the day he'd traced the load transfer from Station Nine. But he hadn't gone into it. He'd stood at the edge and looked and gone back to the main district because he hadn't been invited and it hadn't felt like his place to walk into someone else's neighborhood uninvited.

  Sable walked in like she belonged there, which, from the reactions she received, she did. The dock was built to halfling scale, the walkways narrow, the ceilings of the covered sections low enough that Marcus had to watch his head and Sable had to duck. She ducked with the automatic ease of long practice. The air smelled like fish and rope and the particular brackish quality of canal water that had been sitting in shallow pools against old stone.

  It was busy. Halflings were everywhere, working the dock mechanisms, sorting cargo, calling to each other in a rapid mix of common speech and the canal jargon Marcus was still learning to parse. Children ran between the pylons with the specific energy of kids who'd been told not to run near the water and had decided this instruction was advisory. A woman was mending nets at a workbench, her hands moving faster than Marcus could follow, and she looked up as they passed and said something to Sable in halfling dialect that made Sable make a sound that was almost a laugh.

  "Lira's mother lives three streets in," Sable said. "Dalla. You've met her."

  "I've met her."

  "Her house is forty feet from the canal wall. The structural ward on that section of wall was last reinforced eleven years ago. The standard interval is five years." Sable stopped at a junction where two walkways crossed above a narrow channel. Below them, water moved sluggishly, darker than the main canal, carrying the faint iridescent sheen of concentrated mana residue. "If Station Fourteen fails and the load transfers to the Kettle Dock feeder, the first thing that happens is the mana density in this area drops. The wards weaken. The wall pressurizes against foundations that were designed to have ward support. The buildings closest to the wall start taking structural stress they were never built to handle."

  Marcus looked at the buildings. They were small, built close together, timber framed on stone foundations. The kind of construction that worked when everything was maintained and failed badly when it wasn't. Laundry hung between them on lines strung across the walkway. A halfling man was repairing a shutter on a second-floor window, working without scaffolding, his feet braced on the sill with the casual confidence of someone who'd grown up climbing things built to his scale.

  "How many people live in this section?"

  "Roughly four hundred. Halfling families, mostly. Some humans in the eastern blocks. A few stone person households that settled here because the rents were cheap and nobody minded them."

  A child ran past them, chasing a ball that had bounced off a pylon. A woman's voice called after the child in halfling, the tone universal, the language not. The ball rolled into the channel and the child stopped at the edge and looked at the water with the specific frustration of someone whose recreational equipment had been claimed by geography.

  "This is what your locked gate is protecting," Sable said. "Not the Haele's cargo route. Not the trade margins. This. The locked gate keeps you away from the evidence that the flow diversion is degrading the infrastructure that keeps four hundred people's homes standing."

  Marcus watched the child. The child was maybe five. Brown skin, dark curly hair, bare feet on the walkway. Standing forty feet from a canal wall whose structural ward hadn't been reinforced in eleven years.

  "I'm going to need access to the southern stations," he said.

  "Yes," Sable said. "You are."

  He stopped by Kael's section on the walk back. Kael was working a reinforcement job on a drainage junction, applying structural channeling to a cracked support beam while a human supervisor stood three paces back with a clipboard and an expression of professional tolerance.

  The supervisor was talking to Kael. He was talking the way some people talked to stone people, which was louder than necessary, with shorter sentences than the conversation required. Kael was answering in his usual measured tone, saying exactly what needed to be said, at the volume it needed to be said, and the gap between the two speech patterns was a thing Marcus had started noticing in the way he noticed structural stress in canal walls. Silently. With increasing concern.

  "The channeling methodology you're using," the supervisor said. "Is it standard?"

  "It's effective," Kael said.

  "Right. But is it standard? Per the certification manual?"

  Kael's hands were on the beam. Marcus could see the faintest shimmer in the air around his fingertips, a heat-mirage quality that meant mana was moving through his palms and into the stone. Stone people channeled through contact. It was one of the things the certification tests didn't account for, because the tests had been designed for channelers who worked through gesture and directed focus, the human and drake traditions that had written the manual.

  "The beam will hold," Kael said. "The crack will not propagate. The drainage junction will function correctly."

  The supervisor wrote something on his clipboard. He wrote it in the way that people wrote things when the writing was the point, not the information. "I'll need to flag the methodology as nonstandard in the completion report."

  "You can flag it however you like," Kael said. His voice didn't change. His hands didn't stop. The shimmer in the air didn't waver. "The beam will hold."

  Marcus watched from a distance. He didn't intervene because it wasn't his conversation and Kael didn't need rescuing and the thing happening here wasn't a conflict that could be resolved by a third party saying something righteous. It was a system doing what systems did, which was measuring everything against a standard that had been written by people who looked like the supervisor and not like Kael, and the measurement was always going to come up nonstandard, not because the work was wrong but because the standard was incomplete.

  Kael finished the reinforcement. The supervisor left with his clipboard. Kael stood up and brushed stone dust from his hands and saw Marcus and gave him a look that communicated, in the economical way Kael communicated most things, that he had seen Marcus watching and didn't need to discuss it.

  "Beam looks good," Marcus said.

  "It is good." Kael wiped his hands on his trousers. "The junction won't need reinforcement again for eight years. If I'd used the standard methodology, it would need it again in three. But the report will say nonstandard, and the next supervisor will read the report, and when the junction needs reinforcement in three years because someone else did it the standard way, nobody will remember that the nonstandard method lasted longer."

  They walked together for a while, along the canal path, in the direction of the east yard. The afternoon was warm. Barges moved in the channel. The city made its sounds around them.

  "Sable took me to Kettle Dock today," Marcus said.

  "I know."

  "You know."

  "Sable doesn't go to Kettle Dock casually. When she takes someone there, it means something." He paused. "She took my Hold's elder there two years ago. A week later, the elder started organizing the community response to the waterfront rezoning proposal. I don't think those two events were unrelated."

  Marcus looked at him. Kael looked at the canal.

  "She doesn't tell people what to do," Kael said. "She shows them where the cost lands. People decide for themselves after that."

  Lira came to Grainer's that evening.

  This was unusual. Lira didn't come to Grainer's. Lira had a house with a husband and two children and a mother who lived three streets from the canal wall and she went home after shift the way a person with a life went home after shift. She came through the door and looked around the common room and found Marcus the way a compass finds north, and she sat down across from him and put her hands on the table.

  Her hands were calloused from the locks. There was a scrape across her left knuckles from something she'd caught during the day's work. She didn't appear to have noticed it.

  "Dalla talked to three other operators today," she said. "People she trusts. People who've been on the canal thirty years or more. She asked them about the flow in the tidal section. She was careful about it. Didn't mention you. Didn't mention the locked gate. Just asked if anyone had felt anything different in the southern feed."

  "And?"

  "They confirmed what you're feeling. The draw pattern on Fourteen has changed. Two of them could feel it from Lock Seven, which is four stations upstream. One of them said it's been getting worse for four months." She paused. Her voice dropped, not for secrecy but for the weight of what she was saying. "Four months, Marcus. That's how long the diversion has been running at this level. And it's accelerating."

  He put down his spoon. "That accelerates the timeline."

  "It does."

  "How much?"

  "Dalla thinks the artifice array on Fourteen has maybe two weeks before the compensating draw exceeds its output capacity. After that, the array fails and the load shifts to the feeder lines." She looked at him. Her eyes were dark and direct and the warmth he was used to seeing in them was banked. Not absent. Controlled. The controlled anger her mother had taught her to carry the way you carry a tool you need but can't put down. "Two weeks. And my mother's house is forty feet from the canal wall."

  Two weeks. The word he'd been thinking since Tuesday, now confirmed by people who'd been feeling the canal's pulse since before he was born.

  "What do we do?" he asked.

  Lira looked at the table. Then she looked at the common room, at the canal workers eating their dinners, at Grainer wiping cups with his trembling hand, at the old woman in the corner with her bread and soup. She looked at the room full of people who lived downstream of a system that was being quietly cannibalized for profit, and she looked like someone deciding how much of her anger to let into the room.

  "I don't know yet," she said. "But we don't have two weeks to figure it out."

  She left. Marcus finished his stew. He went upstairs and sat on the edge of the bed and looked at his hands, at the faint residual tingle in his palms that never fully went away anymore, and thought about four hundred people and two weeks and a locked gate and a supervisor writing nonstandard on a clipboard while the beam held.

  The canal ran in the dark outside his window. He could feel it now without trying, a low background awareness that sat behind his other senses the way your heartbeat sits behind your hearing. The pulse. The weight. The breath of the deep.

  That was new. That was, he suspected, going to be a problem.