The gate to the southern junction service path was locked on Tuesday morning.

  Marcus stood in front of it with his log board and his tool belt and the particular patience of a man who had learned, through professional experience, that infrastructure problems were never just infrastructure problems. The gate was a heavy iron affair, waist-high, bolted to the canal wall on both sides. It had been unlocked every morning he'd walked this route. His key fit the mechanism. The mechanism didn't turn.

  He tried it again. The key seated correctly. The tumbler engaged. The bolt didn't move.

  He crouched down and looked at the lock. The faceplate was clean, recently oiled, which was the first wrong thing. Nobody oiled locks in the southern junction. Nobody oiled anything in the southern junction unless they were told to, and maintenance requisitions for the tidal section were, according to Lira, where paperwork went to retire. The second wrong thing was the bolt itself. It was seated a quarter-inch deeper than it should have been, which meant someone had adjusted the strike plate. Recently. The third wrong thing was that the adjustment was good. Precise. Not the work of someone vandalizing a lock but of someone who understood mechanisms well enough to modify one without leaving obvious evidence of tampering. A locksmith's adjustment, done with professional tools on a Saturday when the yard was closed and nobody was counting who walked the service paths.

  Someone had changed the lock.

  Not replaced it. His key still fit. They'd adjusted the mechanism so the bolt seated deeper, which meant a standard canal key would engage the tumbler but not throw the bolt far enough to clear. You'd need a key with a longer throw, a modified key, the kind that wasn't standard issue but would look standard to anyone who didn't measure the throw depth.

  He stood up and looked at the service path on the other side of the gate. It ran along the canal wall for two hundred yards, past the three stations he'd flagged in his log as needing closer inspection. Stations Fourteen, Fifteen, and Sixteen. The ones where the flow readings had been inconsistent for two weeks. The ones where Taveth's pressure curve data didn't match the seasonal baseline.

  The ones south of the Haele family's primary cargo routing.

  He put his key away and walked back to the junction checkpoint.

  Lira was at Lock Seven when he found her, running the morning cycle with Dalla and a halfling apprentice whose name Marcus hadn't learned yet because the apprentice was seventeen and terrified of everyone and spoke primarily in nods. The lock chamber was half-filled, the water level climbing with the controlled patience of a system that had been doing the same thing for centuries and saw no reason to hurry. The sound of it filled the morning air, that low rush and gurgle that Marcus was learning to read the way some people read weather.

  "Southern gate's locked out," Marcus said.

  Lira's hands didn't stop moving on the lock mechanism. She had the practiced coordination of someone whose body knew the work so well that conversation happened in a different part of her brain entirely. Her fingers found adjustments on the valve housing without looking, the way a pianist's hands find keys. "Locked out how?"

  "Strike plate's been adjusted. Standard key seats but won't throw."

  She looked at him. It was a quick look, the kind that took in more than it appeared to. Her hands kept moving. "When did you last run it?"

  "Friday. It was fine Friday."

  Dalla, who had been watching the water level in the lock chamber with the focused attention of someone who'd been watching water levels since before Marcus's parents were born, said without turning around: "Fennis was at the yard Saturday."

  The lock mechanism groaned. Water shifted. The apprentice moved to the secondary valve without being told, which suggested he was paying more attention than his terror implied.

  "Fennis doesn't have authority over service access," Marcus said.

  "Fennis doesn't have authority over anything," Dalla said. "He has relationships. Which is better." She adjusted something on the lock housing by feel, a micro-correction that happened below the level of conscious decision. Her hands were small and weathered and they moved with the absolute certainty of sixty years of practice. "The southern gate lock has been changed twice in the last four years. Both times it was adjusted, not replaced. Both times it happened after someone filed an inspection report on the tidal section stations. Both times the adjustment was reversed within a week, after the reporting cycle had moved on to other things."

  Lira's jaw tightened. It was subtle. If you weren't watching her face at that exact moment you'd miss it, and Marcus was watching her face at that exact moment.

  "I'll talk to Voss," Lira said.

  "Voss will file a maintenance request for the lock," Dalla said. Her tone was patient in the way that very old frustrations are patient. "The request will go to the facilities office. The facilities office will schedule a technician. The technician will come in three to five business days and find that the lock works correctly with the right key, which will have been quietly redistributed by then, and the request will be closed as resolved. The log entry from today's inspection will show that the southern stations were not accessed due to a maintenance issue, which will be noted and forgotten because maintenance issues happen and nobody wants to explain why this one is different."

  The lock chamber reached its target level. Water settled. The apprentice looked at Dalla with an expression that was half admiration and half the dawning realization that the systems he was training to maintain were maintained by other systems he couldn't see.

  "I could climb the gate," Marcus said.

  "You could," Lira said. "And then someone would file a report about unauthorized access to a restricted service section, and your provisional status would become a conversation, and the conversation would end with you being reassigned to hauling debris in the upper junction for the rest of your contract."

  She was right. He knew she was right. That was the thing about institutional obstruction. It didn't need to be dramatic. It just needed to be procedurally correct.

  "So what do I do?"

  Lira finished the lock cycle. The chamber equalized. Somewhere downstream, a barge horn sounded, the long low note that meant a vessel was approaching the junction and expected the locks to be ready, which they were, because Lira's locks were always ready. She wiped her hands on her work trousers and looked at him with an expression that had exhaustion in it and something harder underneath.

  "You log that the southern gate was inaccessible and submit the log with the time stamp. You note the lock modification in the comments field. You don't editorialize. You don't speculate. You describe what you observed, physically, and you file it. And then you inspect the stations you can reach and you do them well and you go home."

  "That won't fix anything."

  "No," she said. "It won't. Welcome to the canal authority."

  He spent the morning on the stations he could reach, the twelve that didn't require the southern gate. He logged them cleanly. His readings were consistent with the seasonal baseline, which meant the sections of canal that nobody was trying to hide were performing within normal parameters. This was not reassuring. It was the equivalent of a building inspector finding that the lobby looked fine while being locked out of the basement.

  At midday he ate flatbread at the canal wall with Kael, who had been clearing sediment from a drainage channel and had the particular look of someone who'd spent four hours in waist-deep water that was colder than anyone had warned him about. His grey-tan skin had a slightly darker cast from the wet, and his hands, large and thick-fingered, held the flatbread with the careful grip of someone whose joints were still thawing.

  "You're thinking loudly," Kael said.

  "I'm eating."

  "You're eating and thinking loudly. Your jaw does a thing."

  Marcus took another bite. His jaw, presumably, did a thing. "Someone changed the lock on the southern service gate."

  Kael ate. He ate the way he did most things, which was thoroughly and without rushing. The canal ran below them, and a pair of barges moved south in the channel, loaded with timber, riding low in the water. One of the barge pilots raised a hand to someone on the dock and received a wave in return. Ordinary morning. Ordinary work. Ordinary city doing ordinary things while its infrastructure was being quietly redesigned by people who would never stand in the water.

  After a while Kael said, "The tidal section."

  "Yes."

  "The stations past the Haele cargo routing."

  Marcus looked at him. Kael looked at his flatbread.

  "Renner told me about the flow inconsistencies," Kael said. "Last week. After you logged the pressure differentials on Fourteen and Fifteen." He took another bite. "He said you'd notice eventually."

  "Notice what?"

  "That the southern section doesn't get inspected the way other sections do. That the stations past the cargo berths have readings that don't match, and the people who file the readings don't file them the same way they file everything else. That the maintenance schedule for the tidal section is always behind because the requisitions get delayed, and the requisitions get delayed because the approvals get held, and the approvals get held because the people who approve them have relationships with people who prefer the section uninspected." He paused. "I noticed two years ago. I mentioned it to my shift supervisor. He told me the tidal section has its own maintenance protocols and I should focus on my assigned work."

  "And you did."

  "I did." Kael's voice was even. Not bitter. Just factual, with the careful flatness of someone who'd learned to carry a particular weight without showing the carrying. "I'm a provisional stone person worker with a failed certification and a nonstandard channeling methodology. I was told to focus on my assigned work. So I focused on my assigned work." He looked at the canal. "The cost of noticing things depends on who's doing the noticing."

  Marcus sat with that. Below them the canal moved, the slow steady displacement of water that was also the slow steady displacement of mana, feeding the city's infrastructure the way blood feeds tissue. Somewhere south of here, past the locked gate, three stations were carrying load they shouldn't have been carrying, and the readings said everything was fine because the readings were being managed by people who needed them to say that.

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  "Does Lira know?" he asked.

  "Lira's known longer than I have. Dalla knew before any of us. They've been filing reports for years. The reports go into the system and the system absorbs them the way the canal absorbs pressure. It doesn't change anything. It just redistributes the weight until the weight is on someone who can't redistribute it further."

  The canal ran below them, patient and indifferent. A gull landed on the far wall and inspected them with the professional interest of an animal that had calculated the probability of unattended food and found it worth investigating.

  "You should eat your flatbread," Kael said. "Before it gets cold."

  Marcus ate his flatbread. It didn't get cold because it was already lukewarm, which was the natural state of flatbread purchased from a cart that served a hundred canal workers between dawn and midday. The gull watched him eat and appeared to judge the pace.

  He went back to the southern gate after his shift.

  This was not the smart thing to do. The smart thing was what Lira had described: log it, file it, move on. Let the system process the obstruction through official channels, where it would be absorbed and neutralized and eventually forgotten in the way that inconvenient observations were always forgotten by institutions with an interest in not knowing things.

  He went anyway. Not because he was brave or reckless or had a plan. Because his brain had been running the flow calculations all afternoon and the numbers were bad and getting worse, and the thing about infrastructure failure was that it didn't wait for you to get the right key.

  The gate was still locked. The service path beyond it was empty in the late afternoon light, the canal wall casting a long shadow across the walkway. He could see Station Fourteen from here, a stone housing set into the canal wall about eighty yards south. The housing had a maintenance hatch and a flow gauge and, if it was like the other stations in this section, an artifice array embedded in the stonework that regulated mana throughput for the surrounding infrastructure. The gauge was too far away to read visually, but he didn't need to read it visually anymore.

  He put his hands on the gate. The iron was warm from the day's sun and underneath the surface warmth there was something else, the faint thrum of mana moving through the canal wall beside him. He'd been feeling this for weeks now, the background pressure of the city's magical infrastructure, the thing Dalla called the pulse and Lira called the weight and Kael called something in a stone-person idiom that translated roughly to the breath of the deep.

  He closed his eyes and leaned into it.

  The flow was there, moving south through the canal wall and the water and the stone foundation beneath both. He could feel the stations he'd already inspected, their artifice arrays drawing ambient mana and processing it the way junction boxes process electrical current, each one pulling its allocation and feeding it into the local infrastructure. He could feel the lock mechanism at Seven, still cycling, Lira's work imprinted on the flow like fingerprints on a window. He could feel the residential feeds branching off into the lower terraces, the slow steady draw of heating stones and light fixtures and water purification wards, thousands of small demands adding up to the constant background hum of a city running on a single supply line.

  And he could feel, further south, past the locked gate, something that wasn't right.

  Station Fourteen was pulling harder than it should have been. The draw was uneven, a stuttering rhythm that suggested the artifice array was compensating for something, working harder to maintain output because the input was being redirected somewhere else. It was the same pattern he'd felt at Station Nine before the pressure buildup, the same signature of a system being asked to do more with less because the resources that should have been available had been diverted.

  He pushed, gently, against the flow. Not with his hands. With whatever part of him it was that had bled the pressure at Nine, the crude instinctive capacity that the system had classified and the healer hadn't explained and nobody had taught him to use. He pushed the way you'd lean against a door that was being pulled from the other side, just enough to feel the resistance, to map its shape.

  The resistance was structured. Not natural. Someone had adjusted the flow allocation in this section. Not the lock on the gate. The actual mana flow. The distribution parameters that determined how much throughput each station received. Fourteen was drawing hard because someone had reduced its allocation, probably routing the excess north through the cargo berths where the Haele family's barges loaded. More mana in the cargo section meant faster lock cycling, faster loading, faster turnaround. A commercial advantage so small it would never show up in the quarterly reports and so consistent it would compound over months into significant profit.

  And Station Fourteen was eating itself to make up the difference.

  He let go of the gate. His hands were tingling, the pins-and-needles feeling that ran from his palms to his elbows. His head ached, the specific dull pressure behind his eyes that came after he pushed against the flow, the cost that was always there and always real. He could taste something metallic at the back of his throat, faint but distinct, and his vision had a subtle brightness at the edges that faded over the next thirty seconds like an afterimage of something that hadn't been light.

  He stood in the fading afternoon and looked at the service path he couldn't reach and the station he could feel but couldn't touch and thought about the woman who had fallen through the bridge walkway in Ohio. About the stress pattern he'd identified and reported and watched get filed away. About the seven months between his report and the failure.

  Station Fourteen wasn't going to wait seven months.

  Text appeared in his vision.

  Flow manipulation noted. Causal interaction: sub-threshold. Monitoring active.

  He read it twice. The words were clinical and flat and utterly unhelpful, which was consistent with everything the system had ever communicated. Flow manipulation. He'd touched the flow and the system had noticed. The system was always noticing. It noticed and classified and moved on, the way Taveth noticed and wrote things on her clipboard, the way Fennis noticed and offered his card, the way the canal authority noticed and filed reports into the administrative equivalent of a black hole.

  Everyone was noticing. Nobody was doing anything.

  He walked back to the junction in the last of the daylight. His head still ached. His hands still tingled. He passed the east yard where the evening crew was starting their shift, two stone people and a human woman checking equipment with the brisk efficiency of people who had somewhere to be and knew exactly how long the walk took. He passed the canal wall where he'd eaten flatbread with Kael that morning, now empty except for the gull, who had found something and was eating it with the self-satisfaction of a successful professional. He walked through the market district where the vendors were closing up and the street lamps were beginning their slow amber ignition as the artifice drew the evening's mana ration.

  He stopped at Sable's shop. The light was on. She was at the cutting table, working on something dark blue that caught the lamplight like water.

  "Someone changed the lock on the southern service gate," he said from the doorway.

  She didn't look up. "I know."

  "You know."

  "Fennis's people adjusted it over the weekend. The information reached me through two separate customers before Monday's market opened." She made a cut in the fabric. Clean, decisive, the sound of shears through wool like a sentence being finished. "I was going to mention it."

  "When?"

  "When it seemed useful." She looked up. Her amber eyes caught the lamplight and held it the way they always did, the vertical pupils slightly wider in the shop's interior light. "Sit down, Cole. You look like a man who's just realized the building he's inspecting doesn't want to be inspected."

  He sat on the customer stool. It was too low for him, which it always was, because it was designed for a shop where most customers were human women of average height and Marcus was a man who was taller than average and sitting in a chair he didn't fit was starting to feel like a metaphor for everything about his situation in this city.

  "The flow allocation in the tidal section has been adjusted," he said. "Someone is routing mana away from Fourteen, Fifteen, and Sixteen toward the cargo berths. Probably to speed up lock cycling for the southern trade families. The stations are compensating but Fourteen is already showing strain. The artifice array is drawing harder to maintain output with reduced input, and it's degrading. The same pattern that happened at Nine."

  Sable set down her shears. She folded her hands on the cutting table. It was the posture she adopted when something required her full attention, which she didn't give freely and didn't waste.

  "My mother spent twenty years proving exactly what you just described," she said. "She had the data. She had the flow models. She had testimony from three halfling operators who could feel the diversion with their hands the same way you're feeling it now. She filed eleven formal complaints with the canal authority over a period of fourteen years. She presented evidence to two different council sessions. She was polite. She was thorough. She followed every procedure." Sable paused. "Nothing happened. The complaints were acknowledged. The evidence was reviewed. The council thanked her for her diligence and noted her concerns for the record. The flow allocation did not change."

  "Because the Haeles control the allocation parameters."

  "Because the Haeles have relationships with the people who control the allocation parameters. Which is better." She picked up her shears again. "You're doing the same thing she did. You're documenting. You're noticing. You're building a case that nobody with the authority to act on it has the incentive to act on. The people who could change the allocation are the people who profit from it. The people who are harmed by it are the people who operate locks and live in lower terrace neighborhoods and don't have seats on the council."

  Marcus looked at the blue fabric on her table. It was a nice fabric. Tightly woven. The kind of material that lasted because it was made well, not because anyone protected it.

  "What happened to your mother's evidence?"

  "It's in the canal authority archives. Filed correctly. Indexed. Accessible to anyone who knows where to look and has the clearance to look there." Something moved behind Sable's expression, something old and heavy that she carried the way Grainer carried his back pain, managed rather than solved. "She died knowing it was all there and none of it mattered. The system didn't reject her evidence. It absorbed it. That's worse, in case you're wondering. Rejection is an answer. Absorption is just silence with filing."

  The shop was quiet. Outside, a cart rattled past on the cobblestones. Someone was singing, faintly, in one of the side streets, a melody Marcus didn't recognize with words in a language he couldn't place. The evening was settling over the market district the way evenings did, slowly and without drama.

  "I'm not building a case," he said.

  "Then what are you doing?"

  "Station Fourteen is going to fail. Not in months. In weeks, maybe less. The strain pattern is the same as Nine before the pressure buildup, but worse because the diversion has been running longer and the station's compensating draw is degrading the artifice array faster than ambient flow can replenish it. When it goes, the load transfers downstream, and downstream of Fourteen is the Kettle Dock feeder, and downstream of that is the residential supply for three neighborhoods in the lower terraces."

  Sable was still. The shears rested in her hands. She didn't move.

  "And when I say neighborhoods," Marcus said, "I mean people's houses. Their plumbing pressure. The mana density that keeps their heating stones functional and their structural wards intact. The wards that keep the canal wall from pushing into the foundations of buildings that were built fifty years ago and haven't been reinforced since." He looked at her. "I mean Lira's mother's house. I mean Kael's Hold."

  She looked at him for a long time. The lamplight moved on her scales, bronze shifting to green in the way it did when the light came from the side. Her expression didn't soften. Sable's expression never softened. But something behind it rearranged, the way load rearranges in infrastructure when a new variable enters the calculation.

  "You can't fix this by yourself," she said.

  "I know."

  "You can't fix this through the system. The system is designed to absorb exactly the kind of evidence you're generating. It has been absorbing it for decades."

  "I know."

  "And you're going to try anyway."

  He stood up from the too-low stool. His head still ached. His hands had stopped tingling but there was a new sensation in them now, a residual awareness of the flow he'd pushed against, as if the infrastructure had left an impression on his skin the way hot metal leaves an impression on a glove. He could still feel Fourteen, faintly, the stuttering draw, the strain in the artifice, the weight of a system slowly failing while the reports said otherwise.

  "I'm going to go eat dinner," he said. "And then I'm going to figure out how to get past a locked gate without climbing it."

  Sable looked at him. For a moment something crossed her face that wasn't calculation or pragmatism or the careful neutrality she maintained the way other people maintained wardrobes. It looked, briefly and reluctantly, like concern.

  "Don't get caught," she said.

  "That's the nicest thing you've ever said to me."

  "It's practical advice. Don't confuse it with sentiment."

  He left the shop. The evening air was cool and the canal ran alongside the street in the dark, and he could feel it, the low constant pressure of the city's blood moving through its veins, and somewhere south of him a station was straining against parameters set by people who would never stand close enough to hear it failing.

  He walked to Grainer's. The inn was warm and the common room had three people in it eating in the quiet way that people eat when they've been working since dawn and conversation is an expense they can't afford. Grainer was behind the bar, his left hand trembling slightly as he wiped down clay cups. The wooden bird sat on its shelf. The stew was lamb again.

  Marcus ate. The stew was good. The bread was the kind that fought back. He thought about Thessaly, Sable's mother, filing eleven complaints over fourteen years. He thought about the bridge report he'd written in Ohio, the one that had been noted and filed and forgotten until a woman fell through the walkway seven months later. He thought about the specific quality of institutional silence, the way it wasn't refusal but absorption, the way it looked like process and felt like concrete.

  He went upstairs and lay on his back and looked at the ceiling crack and did not think about the word cross-referencing.

  He thought about the word weeks.