The fog that rolled down from Whitechapel into the cellars below was not like any fog Thomas Grey had ever seen. It was thicker, heavier, and smelled of something that was not quite damp earth and not quite old paper—something in between, like the breath of a room where someone had died and no one had thought to open the window.

Thomas stood in the doorway of the Underworld Registry and looked down the corridor that stretched beneath the city like the spine of some vast and sleeping creature. The walls were lined with shelves, and on each shelf were thousands of small leather-bound books, each one containing the recorded life of a person who had died in London.

He had been appointed to this position three months ago, after a series of events that he still could not fully explain. He had been an accountant—a respectable, boring, perfectly ordinary accountant for the firm of Harrison & Sons—and then one day a man in a dark coat had come to his office and offered him a job.

"Underworld Registry," the man had said. "Clerk. Third position. You'll be recording lives."

Thomas had laughed. He had thought it was a joke. But the man had not smiled, and he had not left, and by the end of the hour Thomas had signed a contract he did not fully understand and descended a staircase that went deeper than any staircase had any right to go.

Now he stood in the corridor and looked at the shelves and tried to understand what he was supposed to do.

The first book on the nearest shelf was titled "Margaret Ellis, 1888." Thomas pulled it down and opened it. The pages were filled with handwriting—neat, precise, and cold. It was Margaret's life, recorded in full: her birth, her childhood, her work as a seamstress, her marriage to a man named James, her death at age forty-two from consumption.

Thomas turned the pages and felt something move through his chest. It was not fear. It was not sadness. It was the cold, flat certainty that someone else had decided what Margaret's life meant, and had decided it correctly, and had decided it without asking her.

He put the book back on the shelf and walked further down the corridor.

The Underworld Registry was not, as Thomas had initially assumed, a place where dead people went. It was a place where the records of dead people were kept, and where clerks like him decided what those records meant. Each clerk was assigned a district of London, and each district produced a certain number of deaths per month. The clerk's job was to read the records, assess the lives, and assign each deceased person to one of three categories: Redemption, Punishment, or Indifference.

Redemption meant the person's soul would be allowed to move on to whatever came next. Punishment meant their soul would be detained in the undercity for a period of time proportional to the severity of their transgressions. Indifference meant nothing at all—their soul would simply dissipate, like smoke in a strong wind.

Thomas had been assigned the Whitechapel district, which produced approximately forty deaths per month, of which approximately thirty were categorized as Indifference, eight as Punishment, and two as Redemption.

Two out of forty.

He had thought about this number for a long time. He had thought about it while he slept in the small room above the Registry. He had thought about it while he ate his supper of bread and cheese and weak tea. He had thought about it while he walked back to his room after a long day of reading other people's lives and deciding what they meant.

Two out of forty.

On a Thursday in November, Thomas was reading the record of a woman named Clara Hayes when he noticed something he had never noticed before. Clara's record contained a section that was not in any of the other records—a section labeled "Additional Information."

Thomas had never seen this section before. He read it carefully.

"Clara Hayes was approached in October 1888 by a man named William Hastings, who offered her a sum of money in exchange for information about her husband's business dealings. She refused. Mr. Hastings subsequently used his influence to have her husband's business investigated, resulting in the seizure of all assets and the imprisonment of her husband for debt. Clara died of consumption in December 1888. Her husband was released from prison in March 1889 and died of alcoholism in June 1890."

Thomas sat down. He read the section again. Then he pulled the next book from the shelf and looked for the same section. It was there. And in that section, he read about a man named Robert Chenery who had been approached by Mr. Hastings, who had refused, and whose wife and children had subsequently been ruined.

He pulled more books. And more. And more. Every third or fourth book contained this section, and in every one of them, the name William Hastings appeared.

Thomas did not sleep that night. He read every book in the Whitechapel section of the Registry, and he found the Additional Information section in approximately thirty percent of them. In every one of them, the name William Hastings appeared.

William Hastings was a member of the House of Lords. He was a philanthropist. He was a patron of the arts. He was, by all public accounts, a good man.

Thomas went to the Registry's senior clerk the next morning and asked him about William Hastings.

The senior clerk was a man named Mr. Pemberton, who was approximately sixty years old and had been a clerk in the Underworld Registry for approximately forty years. He looked at Thomas with eyes that were flat and tired and had seen everything and felt nothing.

"Mr. Hastings," Mr. Pemberton said. "He is a patron of the Registry."

"What does that mean?"

"It means he contributes to the Registry's operations. He is a benefactor."

"Through what means?"

Mr. Pemberton looked at Thomas for a long time. Then he looked away. "Some things are not your concern, Mr. Grey. You are a clerk. Your job is to read the records and assign the categories. You do not ask questions about the benefactors."

Thomas went back to his desk and picked up the next book. It was titled "James Ellis, 1889." Margaret's husband. He opened it and read.

James Ellis had been imprisoned for debt. He had been released in March 1889. He had died of alcoholism in June 1889.

Category: Indifference.

Thomas put the book back on the shelf. He picked up the next one. And the next one. And the next one.

He was two out of forty.

By December, Thomas had stopped going home. He slept in the Registry. He ate in the Registry. He read the records in the Registry. He had found the Additional Information section in every book he had read, and in every one of them, the name William Hastings appeared.

He had also found something else—a pattern. The people whose records contained the Additional Information section were not random. They were people who had refused Mr. Hastings's offers. They were people who had said no to him, and as a result, their lives had been ruined, and their deaths had been categorized as Indifference.

Thomas stood in the corridor and looked at the shelves and felt something break inside him. It was not a loud break. It was not dramatic. It was a small, quiet break, like a branch snapping under the weight of snow.

He went to the senior clerk and told him what he had found.

Mr. Pemberton listened in silence. When Thomas finished, he said: "I know."

"You know?"

"I know everything that is in this building, Mr. Grey. I have known for forty years. And I have done nothing about it. And you will do nothing about it. Because if you do, they will replace you, and they will find someone else, and the cycle will continue."

"Who are 'they'?"

Mr. Pemberton smiled. It was not a kind smile. "The people who sit in the House of Lords. The people who own the newspapers. The people who decide what is true and what is false, what is good and what is evil, who gets Redemption and who gets Indifference."

Thomas went back to his desk. He picked up the next book. It was titled "William Hastings, 1895."

He opened it and read.

William Hastings had been a benefactor of the Registry. He had contributed significantly to its operations. He had used his influence to ensure that the records were accurate and the categories were fair.

Category: Redemption.

Thomas closed the book. He put it back on the shelf. He sat down at his desk and waited for the next book.

And when it came, he read it. And he assigned the category. And he put it back on the shelf.

And the cycle continued.