The Drowned City

The tram lines came up out of the silt and went down into it again, and following them was the only honest navigation she had. Rails do not care what a map says. They go where somebody was paid to make them go, which in this city turned out to be a question with an answer.

There was a dog collar on a hook in a hallway and no dog anywhere in the city, which Vesper decided was the most encouraging thing she had found. People who take the dog are people who knew. People who knew are people who can be asked.

The money arrived on a Friday, in the amount agreed, from a bank in a country with excellent manners. Vesper spent an hour trying to make the transfer tell her something and learned only that whoever sent it had done this before and had been advised well.

At eleven metres the cold stopped being weather and became a fact about her hands. She worked the buckle by memory rather than feel, counting to herself, and thought about how much of this job was done by the version of her that had practised on a kitchen table.

The bells were still in the tower, and the tower still stood, and at slack water the current pushed them just hard enough to move the clappers a finger's width from the bronze. Vesper hung in the dark and waited for a sound that had every reason to come and never did.

The council photograph was taken on the steps in the spring before the flood, eleven men and two women, and someone had later gone over it with a fine brush and taken out a face. Not crudely. The brickwork behind it had been painted back in by a person who knew what they were doing.

The contract named a client Vesper had never met, care of a firm that existed as a brass plate and a phone that was answered by a service. The fee was generous, the deliverable was vague, and both of those facts were the same fact wearing different clothes.

The second dive went to the council chamber and stayed there an hour, which was forty minutes longer than the plan and eleven minutes longer than was sensible. The safe was open and empty. The minute book was on the table, closed, and had been written up to the last page and signed.

She had taken the job for the money and stayed on it for a reason she could not put in an invoice, which was that the city had been tidied. Someone had gone from room to room. Someone had pushed in the chairs. Vesper wanted the name of the person who had thought of that.

The dry dock at Ferrier's had a crane older than the town and a foreman who could put a container down on a coin. He charged Vesper for three days and gave her five, and never once asked what she was looking for, which she understood as a form of generosity.

The weather up top was doing what the coast does in April, which is everything, briefly, in rotation. Rain, then a light so clean it made the town look fictional, then rain again. Aldo said it was good diving weather and then declined, under questioning, to say what bad weather would be.

The inquest had sat four days and taken evidence from eleven people, and the transcript ran to sixty pages, and Vesper read all of it in a hotel room with the curtains open. Nobody had lied. She was nearly sure of that, and it was the most troubling thing in the file.

The pump house was the only building still locked, and the lock was a good one, and it was fitted to the inside of a door that opened outward. Somebody had locked it and then left by another way, which took Vesper two dives to find and about a minute to understand.

The insurance men arrived in a car too clean for the road and asked three questions, none of which were about the city. Vesper answered all three truthfully and watched them write down a fourth thing she had not said, which is how she learned what they had really come for.

Nobody had told the harbour it was dead. The cranes still turned at the hour, hauling nothing out of nothing, and the bells still marked the tide, and a gull sat on the sunken lamp standard with the settled air of a bird that pays rent.

Salt had got into the paint and lifted it in sheets, so the whole street wore its old colours underneath, a decade at a time. Green under cream under a red that nobody had made since the war, and under all of it the bare wood, patient as a tooth.

Forty minutes of air left, and a staircase going down where a staircase had no business going. She marked it, because marking it was cheaper than explaining later why she had not. The mark was a scratch on a doorframe, and the doorframe was mahogany.

She counted the doorways as she passed them. Sixteen, and every one of them open, and every one of them dark in the particular way that means a room still has its furniture. Nobody boards a door they mean to come back through, and nobody leaves one open if they do.

The city had gone under in a single night, the records said, and the records had been written by the people who opened the sluices. Vesper had read enough salvage paperwork to know that a tidy account of a disaster is a confession with better handwriting.

The clerk at the county archive had a cardigan for each day of the week and a memory that made microfilm redundant. She said the drainage file had been requested twice in forty years. Once by a historian, she said, and once by a man who did not leave a name and did not need to be shown where it was.

The survey map was wrong in a way that took her three dives to see. It was not inaccurate. It was out of date by about eighteen months in one district only, and the difference was a row of houses that the map still showed and the water had not been given the chance to take.

Her lamp found the sign for a bakery, then the bakery, then the ovens, cold and clean and stacked with trays nobody had come back for. Whoever left had left in order. That was the part she kept turning over on the way up: not the leaving, the tidying.

The harbour office had a photograph of the flood on the wall, framed, in the corridor where people are left to wait. Vesper stood in front of it long enough to work out that it had been taken from a boat, at night, by somebody already on the water before the water came.

Her regulator had been rebuilt twice by a man in a shed who took cash and wrote a receipt anyway. Vesper trusted it further than she trusted the boat, the contract, or the version of events she had been handed in writing on the first morning.

The fee would clear what she owed on the boat and leave enough to be dangerous, and she had accepted it inside four minutes. She thought about that in the decompression stop, hanging in the green with nothing to do, which is where this job does its actual thinking.

Silt is not dirt. It is everything the city ever dropped, ground fine and laid down in the order it fell, and a fin stroke in the wrong place takes ten years of it into the water and buys you an hour of blindness. She moved the way you move past a sleeping dog.

The choir school had a piano in the hall, and the piano had swollen until its case had split along the grain like something opening. She did not touch it. The one thing she had promised herself on this job was that she would not go looking for the sound it made.

Aldo kept a list of everyone who had asked about the city in the eleven years he had run the tender. It was written on the back of a chart in four different pens, and he handed it over without being asked, on the second Thursday, once he had decided about her.

The Harbourmaster's assistant was twenty-three, efficient and entirely without curiosity, which made her the most useful person in the building. She gave up the drainage file's reference number because she had no reason not to, and no idea it was the whole of what Vesper had come for.

Salvage law is generous to whoever gets there first and merciless about paperwork, which is why Vesper filed her notice of operations on the morning she arrived rather than the afternoon. It cost her a day of diving and bought her a document with a date on it.

The hotel register for that week had thirty-one names in it, and thirty of them settled their bills. Vesper had a photocopy of the page, and she had looked at the thirty-first name often enough now that she could see it with her eyes shut, which was not the same as understanding it.

The sluice gates were the only part of the city built to be looked at. Somebody had put scrollwork on the housings, and a date, and a motto in a dead language, and had then gone to the trouble of oiling the mechanism for thirty years so it would open in one night without a sound.

Decompression is arithmetic with a penalty for arrogance. She ran the tables on paper even though the computer on her wrist had already run them, because the computer had never once explained itself and she had known two people it turned out to have been wrong about.

Her dive log was a legal document, which meant it was written for a stranger who would read it in bad faith. Depth, time, temperature, what she touched and what she did not. The things she actually thought went in a second notebook that lived in her boot.

The library had closed in the eighties and the flood had merely finished the argument. The shelves stood in their rows with the books gone to pulp, and one drawer of the card catalogue had been pulled out and taken away, which is not a thing water does.

The town above the flood line had grown by a third since the water came, in the bad way, all of it bungalows and none of it planned. The new streets were named after trees that had never grown in that soil and after councillors who had.

The Harbourmaster kept his ledgers in a language that had been invented to be difficult, which Vesper took as a compliment to whoever he expected to come looking. Three columns, no headings, and a fourth column in pencil that had been rubbed out and written again more times than the paper could take.

There is no such thing as a quiet forty metres. The suit talks, the gas talks, the hull overhead talks to itself all night, and a diver who tells you she works in silence is a diver who has stopped hearing the noise she agreed to live inside.

Her second notebook kept a page for things that were not evidence. The dog collar was on it. So was the tidiness, and the pencil column, and the fact that the Harbourmaster had asked her what she had found rather than whether she had found anything at all.

There was a sound under the hull that was not the hull. It kept time badly, the way a person does when they are humming something they have only half remembered, and it stopped whenever she stopped to listen, which she was too tired that week to find frightening.

A church at the foot of a street is a church at any depth, and Vesper, who had no religion and no patience for people who found one at eleven metres, still took her light off the altar and went around it rather than through.

Up top, the tender was making coffee and pretending not to watch the line. He had been doing this eleven years and had lost two divers, and he counted every bubble that came up as though counting were a form of rope.

The Harbourmaster's office had a window that looked at nothing, and he sat facing it anyway. He asked her what she had found. She said furniture. He said that was a pity, and wrote something down, and she watched him write it and learned nothing at all.

There is a way water holds a room after the room has stopped being one. Vesper had felt it in wrecks and in flooded mines, and she felt it here, in a council chamber, where the chairs had been pushed in neatly under the table before the sea arrived.

The water had a grain to it that far down, like old glass, and Vesper had learned to read it the way other people read weather. Thicker meant colder, colder meant she had drifted west of the harbour wall, and the compass could say whatever it liked about that.

Sound underwater arrives from everywhere at once, which is why divers learn to distrust their ears and trust their watches. Vesper had spent two decades unlearning the instinct to turn her head. In the city she caught herself turning it anyway, every time, and every time there was nothing.

At the end of the fourth street the road stopped at a wall that appeared on no plan, two courses of new brick laid across a right of way, built under the water or built before it. Vesper photographed it from both sides and thought about it for the rest of the week.

The Harbourmaster's own name appeared once in the drainage file, in the fourth column, in pencil, in a hand that was not his. Vesper photographed it, put the file back exactly as she had found it, thanked the clerk in the Tuesday cardigan, and went out into the rain to think.

A child's bicycle was chained to a railing outside a house with its curtains drawn. The chain had outlasted the bicycle, which had outlasted the railing, and Vesper found she had been floating there long enough that the tender's voice came down the line to ask whether she was all right.

She had a rule about clients, which was that the second question is the real one. This client's second question, relayed through the firm with the brass plate, had been whether the council chamber could be entered. Not what was in it. Whether a person could get in.

There was a woman in a flat above a chemist two towns over who had been nine years old that night, and who described the water as arriving politely. It came up the road, she said, the way a bus comes, and everyone was already standing outside with their coats on.

A woman in the post office remembered the sirens, and said they had sounded twice, an hour apart, and that the first time everyone had come out into the street to look at each other and laugh. It was the laughing she still heard, she said, not the water.

The lock keeper's cottage stood above the waterline, which was itself the point. Somebody had built it high, and recently, and had faced its one good window down the valley towards the sluices, and had planted a hedge that took fifteen years to reach the height it now was.

A diver had come before her. The archive clerk knew it, the Harbourmaster had not mentioned it, and the doorframe on the fourth street already carried a scratch at exactly the height a person makes one. Hers was next to it now, and looked like a reply.

The dry dock at Ferrier's had a crane older than the town and a foreman who could put a container down on a coin. He charged Vesper for three days and gave her five, and never once asked what she was looking for, which she understood as a form of generosity.

Nobody had told the harbour it was dead. The cranes still turned at the hour, hauling nothing out of nothing, and the bells still marked the tide, and a gull sat on the sunken lamp standard with the settled air of a bird that pays rent.

The inquest had sat four days and taken evidence from eleven people, and the transcript ran to sixty pages, and Vesper read all of it in a hotel room with the curtains open. Nobody had lied. She was nearly sure of that, and it was the most troubling thing in the file.

She counted the doorways as she passed them. Sixteen, and every one of them open, and every one of them dark in the particular way that means a room still has its furniture. Nobody boards a door they mean to come back through, and nobody leaves one open if they do.

Salt had got into the paint and lifted it in sheets, so the whole street wore its old colours underneath, a decade at a time. Green under cream under a red that nobody had made since the war, and under all of it the bare wood, patient as a tooth.

The weather up top was doing what the coast does in April, which is everything, briefly, in rotation. Rain, then a light so clean it made the town look fictional, then rain again. Aldo said it was good diving weather and then declined, under questioning, to say what bad weather would be.

The insurance men arrived in a car too clean for the road and asked three questions, none of which were about the city. Vesper answered all three truthfully and watched them write down a fourth thing she had not said, which is how she learned what they had really come for.

The bells were still in the tower, and the tower still stood, and at slack water the current pushed them just hard enough to move the clappers a finger's width from the bronze. Vesper hung in the dark and waited for a sound that had every reason to come and never did.

At eleven metres the cold stopped being weather and became a fact about her hands. She worked the buckle by memory rather than feel, counting to herself, and thought about how much of this job was done by the version of her that had practised on a kitchen table.

Her lamp found the sign for a bakery, then the bakery, then the ovens, cold and clean and stacked with trays nobody had come back for. Whoever left had left in order. That was the part she kept turning over on the way up: not the leaving, the tidying.

The survey map was wrong in a way that took her three dives to see. It was not inaccurate. It was out of date by about eighteen months in one district only, and the difference was a row of houses that the map still showed and the water had not been given the chance to take.

The city had gone under in a single night, the records said, and the records had been written by the people who opened the sluices. Vesper had read enough salvage paperwork to know that a tidy account of a disaster is a confession with better handwriting.

The second dive went to the council chamber and stayed there an hour, which was forty minutes longer than the plan and eleven minutes longer than was sensible. The safe was open and empty. The minute book was on the table, closed, and had been written up to the last page and signed.

The council photograph was taken on the steps in the spring before the flood, eleven men and two women, and someone had later gone over it with a fine brush and taken out a face. Not crudely. The brickwork behind it had been painted back in by a person who knew what they were doing.

The clerk at the county archive had a cardigan for each day of the week and a memory that made microfilm redundant. She said the drainage file had been requested twice in forty years. Once by a historian, she said, and once by a man who did not leave a name and did not need to be shown where it was.

The pump house was the only building still locked, and the lock was a good one, and it was fitted to the inside of a door that opened outward. Somebody had locked it and then left by another way, which took Vesper two dives to find and about a minute to understand.

Her regulator had been rebuilt twice by a man in a shed who took cash and wrote a receipt anyway. Vesper trusted it further than she trusted the boat, the contract, or the version of events she had been handed in writing on the first morning.

Forty minutes of air left, and a staircase going down where a staircase had no business going. She marked it, because marking it was cheaper than explaining later why she had not. The mark was a scratch on a doorframe, and the doorframe was mahogany.

The Harbourmaster's assistant was twenty-three, efficient and entirely without curiosity, which made her the most useful person in the building. She gave up the drainage file's reference number because she had no reason not to, and no idea it was the whole of what Vesper had come for.

The hotel register for that week had thirty-one names in it, and thirty of them settled their bills. Vesper had a photocopy of the page, and she had looked at the thirty-first name often enough now that she could see it with her eyes shut, which was not the same as understanding it.

The library had closed in the eighties and the flood had merely finished the argument. The shelves stood in their rows with the books gone to pulp, and one drawer of the card catalogue had been pulled out and taken away, which is not a thing water does.

The money arrived on a Friday, in the amount agreed, from a bank in a country with excellent manners. Vesper spent an hour trying to make the transfer tell her something and learned only that whoever sent it had done this before and had been advised well.

The harbour office had a photograph of the flood on the wall, framed, in the corridor where people are left to wait. Vesper stood in front of it long enough to work out that it had been taken from a boat, at night, by somebody already on the water before the water came.

There was a dog collar on a hook in a hallway and no dog anywhere in the city, which Vesper decided was the most encouraging thing she had found. People who take the dog are people who knew. People who knew are people who can be asked.

The choir school had a piano in the hall, and the piano had swollen until its case had split along the grain like something opening. She did not touch it. The one thing she had promised herself on this job was that she would not go looking for the sound it made.

The contract named a client Vesper had never met, care of a firm that existed as a brass plate and a phone that was answered by a service. The fee was generous, the deliverable was vague, and both of those facts were the same fact wearing different clothes.

The sluice gates were the only part of the city built to be looked at. Somebody had put scrollwork on the housings, and a date, and a motto in a dead language, and had then gone to the trouble of oiling the mechanism for thirty years so it would open in one night without a sound.

The town above the flood line had grown by a third since the water came, in the bad way, all of it bungalows and none of it planned. The new streets were named after trees that had never grown in that soil and after councillors who had.

A church at the foot of a street is a church at any depth, and Vesper, who had no religion and no patience for people who found one at eleven metres, still took her light off the altar and went around it rather than through.

The Harbourmaster's office had a window that looked at nothing, and he sat facing it anyway. He asked her what she had found. She said furniture. He said that was a pity, and wrote something down, and she watched him write it and learned nothing at all.

There was a sound under the hull that was not the hull. It kept time badly, the way a person does when they are humming something they have only half remembered, and it stopped whenever she stopped to listen, which she was too tired that week to find frightening.

Her dive log was a legal document, which meant it was written for a stranger who would read it in bad faith. Depth, time, temperature, what she touched and what she did not. The things she actually thought went in a second notebook that lived in her boot.

She had taken the job for the money and stayed on it for a reason she could not put in an invoice, which was that the city had been tidied. Someone had gone from room to room. Someone had pushed in the chairs. Vesper wanted the name of the person who had thought of that.

There is no such thing as a quiet forty metres. The suit talks, the gas talks, the hull overhead talks to itself all night, and a diver who tells you she works in silence is a diver who has stopped hearing the noise she agreed to live inside.

Salvage law is generous to whoever gets there first and merciless about paperwork, which is why Vesper filed her notice of operations on the morning she arrived rather than the afternoon. It cost her a day of diving and bought her a document with a date on it.

Up top, the tender was making coffee and pretending not to watch the line. He had been doing this eleven years and had lost two divers, and he counted every bubble that came up as though counting were a form of rope.

Her second notebook kept a page for things that were not evidence. The dog collar was on it. So was the tidiness, and the pencil column, and the fact that the Harbourmaster had asked her what she had found rather than whether she had found anything at all.

She had a rule about clients, which was that the second question is the real one. This client's second question, relayed through the firm with the brass plate, had been whether the council chamber could be entered. Not what was in it. Whether a person could get in.

A diver had come before her. The archive clerk knew it, the Harbourmaster had not mentioned it, and the doorframe on the fourth street already carried a scratch at exactly the height a person makes one. Hers was next to it now, and looked like a reply.

A woman in the post office remembered the sirens, and said they had sounded twice, an hour apart, and that the first time everyone had come out into the street to look at each other and laugh. It was the laughing she still heard, she said, not the water.

A child's bicycle was chained to a railing outside a house with its curtains drawn. The chain had outlasted the bicycle, which had outlasted the railing, and Vesper found she had been floating there long enough that the tender's voice came down the line to ask whether she was all right.

At the end of the fourth street the road stopped at a wall that appeared on no plan, two courses of new brick laid across a right of way, built under the water or built before it. Vesper photographed it from both sides and thought about it for the rest of the week.

There was a woman in a flat above a chemist two towns over who had been nine years old that night, and who described the water as arriving politely. It came up the road, she said, the way a bus comes, and everyone was already standing outside with their coats on.

The Harbourmaster's own name appeared once in the drainage file, in the fourth column, in pencil, in a hand that was not his. Vesper photographed it, put the file back exactly as she had found it, thanked the clerk in the Tuesday cardigan, and went out into the rain to think.

The lock keeper's cottage stood above the waterline, which was itself the point. Somebody had built it high, and recently, and had faced its one good window down the valley towards the sluices, and had planted a hedge that took fifteen years to reach the height it now was.

Silt is not dirt. It is everything the city ever dropped, ground fine and laid down in the order it fell, and a fin stroke in the wrong place takes ten years of it into the water and buys you an hour of blindness. She moved the way you move past a sleeping dog.

Sound underwater arrives from everywhere at once, which is why divers learn to distrust their ears and trust their watches. Vesper had spent two decades unlearning the instinct to turn her head. In the city she caught herself turning it anyway, every time, and every time there was nothing.

The water had a grain to it that far down, like old glass, and Vesper had learned to read it the way other people read weather. Thicker meant colder, colder meant she had drifted west of the harbour wall, and the compass could say whatever it liked about that.

The fee would clear what she owed on the boat and leave enough to be dangerous, and she had accepted it inside four minutes. She thought about that in the decompression stop, hanging in the green with nothing to do, which is where this job does its actual thinking.

Aldo kept a list of everyone who had asked about the city in the eleven years he had run the tender. It was written on the back of a chart in four different pens, and he handed it over without being asked, on the second Thursday, once he had decided about her.

Decompression is arithmetic with a penalty for arrogance. She ran the tables on paper even though the computer on her wrist had already run them, because the computer had never once explained itself and she had known two people it turned out to have been wrong about.

There is a way water holds a room after the room has stopped being one. Vesper had felt it in wrecks and in flooded mines, and she felt it here, in a council chamber, where the chairs had been pushed in neatly under the table before the sea arrived.

The tram lines came up out of the silt and went down into it again, and following them was the only honest navigation she had. Rails do not care what a map says. They go where somebody was paid to make them go, which in this city turned out to be a question with an answer.

The Harbourmaster kept his ledgers in a language that had been invented to be difficult, which Vesper took as a compliment to whoever he expected to come looking. Three columns, no headings, and a fourth column in pencil that had been rubbed out and written again more times than the paper could take.

Nobody had told the harbour it was dead. The cranes still turned at the hour, hauling nothing out of nothing, and the bells still marked the tide, and a gull sat on the sunken lamp standard with the settled air of a bird that pays rent.

The city had gone under in a single night, the records said, and the records had been written by the people who opened the sluices. Vesper had read enough salvage paperwork to know that a tidy account of a disaster is a confession with better handwriting.

Forty minutes of air left, and a staircase going down where a staircase had no business going. She marked it, because marking it was cheaper than explaining later why she had not. The mark was a scratch on a doorframe, and the doorframe was mahogany.

The weather up top was doing what the coast does in April, which is everything, briefly, in rotation. Rain, then a light so clean it made the town look fictional, then rain again. Aldo said it was good diving weather and then declined, under questioning, to say what bad weather would be.

Her regulator had been rebuilt twice by a man in a shed who took cash and wrote a receipt anyway. Vesper trusted it further than she trusted the boat, the contract, or the version of events she had been handed in writing on the first morning.

The inquest had sat four days and taken evidence from eleven people, and the transcript ran to sixty pages, and Vesper read all of it in a hotel room with the curtains open. Nobody had lied. She was nearly sure of that, and it was the most troubling thing in the file.

The insurance men arrived in a car too clean for the road and asked three questions, none of which were about the city. Vesper answered all three truthfully and watched them write down a fourth thing she had not said, which is how she learned what they had really come for.

At eleven metres the cold stopped being weather and became a fact about her hands. She worked the buckle by memory rather than feel, counting to herself, and thought about how much of this job was done by the version of her that had practised on a kitchen table.

The clerk at the county archive had a cardigan for each day of the week and a memory that made microfilm redundant. She said the drainage file had been requested twice in forty years. Once by a historian, she said, and once by a man who did not leave a name and did not need to be shown where it was.

The dry dock at Ferrier's had a crane older than the town and a foreman who could put a container down on a coin. He charged Vesper for three days and gave her five, and never once asked what she was looking for, which she understood as a form of generosity.

The bells were still in the tower, and the tower still stood, and at slack water the current pushed them just hard enough to move the clappers a finger's width from the bronze. Vesper hung in the dark and waited for a sound that had every reason to come and never did.

Her lamp found the sign for a bakery, then the bakery, then the ovens, cold and clean and stacked with trays nobody had come back for. Whoever left had left in order. That was the part she kept turning over on the way up: not the leaving, the tidying.

The money arrived on a Friday, in the amount agreed, from a bank in a country with excellent manners. Vesper spent an hour trying to make the transfer tell her something and learned only that whoever sent it had done this before and had been advised well.

The council photograph was taken on the steps in the spring before the flood, eleven men and two women, and someone had later gone over it with a fine brush and taken out a face. Not crudely. The brickwork behind it had been painted back in by a person who knew what they were doing.

She counted the doorways as she passed them. Sixteen, and every one of them open, and every one of them dark in the particular way that means a room still has its furniture. Nobody boards a door they mean to come back through, and nobody leaves one open if they do.

There was a dog collar on a hook in a hallway and no dog anywhere in the city, which Vesper decided was the most encouraging thing she had found. People who take the dog are people who knew. People who knew are people who can be asked.

The choir school had a piano in the hall, and the piano had swollen until its case had split along the grain like something opening. She did not touch it. The one thing she had promised herself on this job was that she would not go looking for the sound it made.

The library had closed in the eighties and the flood had merely finished the argument. The shelves stood in their rows with the books gone to pulp, and one drawer of the card catalogue had been pulled out and taken away, which is not a thing water does.

The town above the flood line had grown by a third since the water came, in the bad way, all of it bungalows and none of it planned. The new streets were named after trees that had never grown in that soil and after councillors who had.

The second dive went to the council chamber and stayed there an hour, which was forty minutes longer than the plan and eleven minutes longer than was sensible. The safe was open and empty. The minute book was on the table, closed, and had been written up to the last page and signed.

She had taken the job for the money and stayed on it for a reason she could not put in an invoice, which was that the city had been tidied. Someone had gone from room to room. Someone had pushed in the chairs. Vesper wanted the name of the person who had thought of that.

The sluice gates were the only part of the city built to be looked at. Somebody had put scrollwork on the housings, and a date, and a motto in a dead language, and had then gone to the trouble of oiling the mechanism for thirty years so it would open in one night without a sound.

The contract named a client Vesper had never met, care of a firm that existed as a brass plate and a phone that was answered by a service. The fee was generous, the deliverable was vague, and both of those facts were the same fact wearing different clothes.

Salt had got into the paint and lifted it in sheets, so the whole street wore its old colours underneath, a decade at a time. Green under cream under a red that nobody had made since the war, and under all of it the bare wood, patient as a tooth.

The Harbourmaster's assistant was twenty-three, efficient and entirely without curiosity, which made her the most useful person in the building. She gave up the drainage file's reference number because she had no reason not to, and no idea it was the whole of what Vesper had come for.

The Harbourmaster's office had a window that looked at nothing, and he sat facing it anyway. He asked her what she had found. She said furniture. He said that was a pity, and wrote something down, and she watched him write it and learned nothing at all.

Her dive log was a legal document, which meant it was written for a stranger who would read it in bad faith. Depth, time, temperature, what she touched and what she did not. The things she actually thought went in a second notebook that lived in her boot.

At the end of the fourth street the road stopped at a wall that appeared on no plan, two courses of new brick laid across a right of way, built under the water or built before it. Vesper photographed it from both sides and thought about it for the rest of the week.

The hotel register for that week had thirty-one names in it, and thirty of them settled their bills. Vesper had a photocopy of the page, and she had looked at the thirty-first name often enough now that she could see it with her eyes shut, which was not the same as understanding it.

She had a rule about clients, which was that the second question is the real one. This client's second question, relayed through the firm with the brass plate, had been whether the council chamber could be entered. Not what was in it. Whether a person could get in.

A diver had come before her. The archive clerk knew it, the Harbourmaster had not mentioned it, and the doorframe on the fourth street already carried a scratch at exactly the height a person makes one. Hers was next to it now, and looked like a reply.

There is no such thing as a quiet forty metres. The suit talks, the gas talks, the hull overhead talks to itself all night, and a diver who tells you she works in silence is a diver who has stopped hearing the noise she agreed to live inside.

There was a woman in a flat above a chemist two towns over who had been nine years old that night, and who described the water as arriving politely. It came up the road, she said, the way a bus comes, and everyone was already standing outside with their coats on.

The Harbourmaster's own name appeared once in the drainage file, in the fourth column, in pencil, in a hand that was not his. Vesper photographed it, put the file back exactly as she had found it, thanked the clerk in the Tuesday cardigan, and went out into the rain to think.

A child's bicycle was chained to a railing outside a house with its curtains drawn. The chain had outlasted the bicycle, which had outlasted the railing, and Vesper found she had been floating there long enough that the tender's voice came down the line to ask whether she was all right.

A woman in the post office remembered the sirens, and said they had sounded twice, an hour apart, and that the first time everyone had come out into the street to look at each other and laugh. It was the laughing she still heard, she said, not the water.

The survey map was wrong in a way that took her three dives to see. It was not inaccurate. It was out of date by about eighteen months in one district only, and the difference was a row of houses that the map still showed and the water had not been given the chance to take.

The lock keeper's cottage stood above the waterline, which was itself the point. Somebody had built it high, and recently, and had faced its one good window down the valley towards the sluices, and had planted a hedge that took fifteen years to reach the height it now was.

A church at the foot of a street is a church at any depth, and Vesper, who had no religion and no patience for people who found one at eleven metres, still took her light off the altar and went around it rather than through.

The fee would clear what she owed on the boat and leave enough to be dangerous, and she had accepted it inside four minutes. She thought about that in the decompression stop, hanging in the green with nothing to do, which is where this job does its actual thinking.

The tram lines came up out of the silt and went down into it again, and following them was the only honest navigation she had. Rails do not care what a map says. They go where somebody was paid to make them go, which in this city turned out to be a question with an answer.

Sound underwater arrives from everywhere at once, which is why divers learn to distrust their ears and trust their watches. Vesper had spent two decades unlearning the instinct to turn her head. In the city she caught herself turning it anyway, every time, and every time there was nothing.

Decompression is arithmetic with a penalty for arrogance. She ran the tables on paper even though the computer on her wrist had already run them, because the computer had never once explained itself and she had known two people it turned out to have been wrong about.

The water had a grain to it that far down, like old glass, and Vesper had learned to read it the way other people read weather. Thicker meant colder, colder meant she had drifted west of the harbour wall, and the compass could say whatever it liked about that.

The Harbourmaster kept his ledgers in a language that had been invented to be difficult, which Vesper took as a compliment to whoever he expected to come looking. Three columns, no headings, and a fourth column in pencil that had been rubbed out and written again more times than the paper could take.