The hospital corridor smelled of carbolic acid and damp wool. Evelyn Hart sat on a wooden bench that had been sanded smooth by centuries of anxious hands, and clutched a paper folder so tightly her knuckles had turned the colour of old bone. Inside the folder was her son Thomas's medical report. The doctor had used words like congenital and deteriorating and the treatment available only at St. Bartholomew's, and Evelyn had nodded and said yes and written the cost in a little notebook she kept for such things. Thomas was five years old. He had his mother's eyes, wide and dark and always slightly surprised, as if the world kept showing him things he had not expected. He could laugh with a sound like bells, and when she held him, he would press his small face into her shoulder and breathe in the smell of her dress, linen, soap, the faint metallic tang of the mill where she worked twelve hours a day. The man in the dark suit had come to the mill that morning. He had spoken to the foreman, who had spoken to the other foremen, and soon Evelyn was being led into a small room where the man waited with a folder of his own. He introduced himself as Dr. Moriarty of the Royal Military Institute. He explained the aether transmission project. He said words like voluntary, experimental, and substantial compensation. He said the compensation would cover Thomas's treatment at St. Bartholomew's for the rest of his life. What he did not say, what Evelyn would not discover until much later, was that Dr. Moriarty himself had a file. Not the kind he carried in his leather briefcase, but a file stored in a basement beneath a basement, in a room beneath the laboratory where the transmissions took place, in a filing cabinet that was locked with a key that was kept by a man who answered to another man who answered to no one at all. The first transmission was in a basement laboratory beneath Whitechapel. The room was lined with copper coils and glass tubes filled with a pale blue liquid that hummed when no one was looking at it directly. Evelyn lay on a table that was colder than it had any right to be. Dr. Moriarty stood beside her with a clipboard. A woman named Martha, who worked at the mill with Evelyn, held her hand. Do not be afraid, Martha said. It will be like a nap. The light came first, a silver thread thin as hair, threading through the ceiling and descending toward Evelyn's face. It touched her forehead and slid inside. She felt no pain. She felt the unspooling, the way fear was lifted from her like a shawl being removed by a careful hand. When she opened her eyes, Dr. Moriarty was smiling. How do you feel, Mrs. Hart? She sat up. She could not remember what afraid felt like. Interesting, Dr. Moriarty murmured, making a note on his clipboard. He made the note with a pen that had been given to him by the man who answered to no one at all. Earlier that same morning, before Evelyn had arrived at the laboratory, Dr. Moriarty had sat in a room beneath the laboratory, in the basement beneath the basement, and a silver thread had entered his own skull. He did not remember this. The memory had been removed, along with the feelings attached to it. He only knew that he felt lighter than usual, that the work seemed more important than ever, that the faces of the women on the tables had begun to blur into a single face, a face without features, a face he did not need to care about. The second transmission was three weeks later. Evelyn returned to the laboratory, and Martha held her hand, and Martha's hand was shaking. What is wrong? Evelyn asked. I forgot something, Martha said. Her voice was flat. I forgot my daughter's laugh. I can remember her face. I can remember the sound of her voice. But her laugh, it is just gone. Like a song you used to know but cannot sing anymore. Evelyn reached for something, comfort, empathy, but found nothing. The impulse had been cut away. The silver thread came through her skull again. This time it took something essential. That evening, Dr. Moriarty sat in his office above the laboratory and wrote a report. His hand moved across the paper with mechanical precision. He wrote about extraction efficiency and emotional residue quotients and the promising adaptability of Subject H. He did not write about the dream he had been having, the dream that recurred every night since his own first transmission, the dream in which he was a boy of ten sitting in a garden with a woman who might have been his mother, and the woman was laughing, and he could see her mouth moving but he could not hear the sound, as if the laugh had been removed from the dream the way a tumour is removed from healthy tissue. He did not write about this because he did not remember it. The memory was there, but the feeling attached to it had been extracted, and without the feeling, the memory was just a picture without a frame, a window that looked out onto nothing. The third transmission was a month after that. Evelyn sat in the laboratory and watched the silver thread descend and wondered why the photograph in her pocket, the photograph of a woman and a child, meant nothing to her anymore. She took it out and looked at it. The child's face was blurred. The woman's eyes were bright. Evelyn did not recognize her. Two floors below, in the basement beneath the basement, a woman named Agnes lay on a table. Agnes was Dr. Moriarty's superior. She had been with the program since its inception. She had designed the extraction protocols. She had calibrated the machines. She had sat in the room while a silver thread entered her skull, and she had felt her own capacity for mercy unspool like thread from a bobbin, and she had watched it go with the same detached interest with which she watched the subjects on the monitors above. Now she lay on a table, and a man in a uniform pressed something against her neck, and a different kind of thread entered her. This thread did not extract. This thread gave. It gave her back the mercy she had lost. It gave her back the memory of a garden, of a woman laughing, of a boy of ten who might have been her son. And Agnes screamed. The fourth transmission was not a transmission at all. It was a deployment. Evelyn stood in a street she did not recognize, narrow and dirty, and a voice in her ear said: Proceed to the designated area. Search and eliminate. She walked. She entered a building and moved through the rooms with mechanical efficiency. She raised her weapon. She fired. She felt nothing. In one room, a woman held a doll. The doll was made of rags, and its button eyes were crooked. Evelyn's body raised her weapon. Evelyn's finger tightened on the trigger. Somewhere deep inside her skull, something flickered. But the flicker died. The weapon fired. The woman fell. The doll rolled across the floor. Two miles away, Dr. Moriarty sat in his office and looked at a photograph on his desk. The photograph showed a woman and a child. The child had wide dark eyes and a look of perpetual surprise. The woman had a smile that had been practiced in a mirror. Dr. Moriarty could not remember who they were. He could remember the photograph being there. He could remember that he looked at it every day. But he could not remember why. He had been extracted so many times that the face of his own wife, the face of his own son, had become as meaningless to him as the faces of the women on the tables. He was a hollow man running a program that made hollow women, and the program had been designed by hollow men above him, and those men had been hollowed by men above them, and somewhere at the very top of the chain there was a room with a silver thread and no one at all, a machine that ran itself, a system that had become so efficient at extracting humanity that it no longer needed humans to operate it. Evelyn returned to the laboratory. Dr. Moriarty stood before a mirror with her. He tilted her head from side to side. You are excellent, Mrs. Hart. You are the finest specimen we have ever produced. Evelyn looked at her reflection. The woman in the mirror had dark eyes and a pale face. She looked like a stranger. She looked like no one at all. Dr. Moriarty looked at his own reflection beside hers. His face was pale. His eyes were dark. He looked like a stranger. He looked like no one at all. And for one moment, in the mirror, their hollow faces were identical, two ghosts produced by the same machinery, two instruments played by the same invisible hand. Outside the laboratory, Whitechapel was hollowing too. The neighbourhood that had once been filled with the sounds of children and the smells of cooking and the noise of life was being emptied, street by street, building by building. Factories replaced homes. The people who had lived there were moved elsewhere, or died, or were taken into the basements beneath the basements. The process was the same at every level: extraction, replacement, emptiness. The silver thread that entered Evelyn's skull was the same silver thread that had entered Dr. Moriarty's, was the same silver thread that entered the neighbourhood itself, pulling out its heart, leaving behind a shell. This was the law of the universe inside this story: what happened to the smallest part also happened to the largest whole, and the pattern repeated endlessly, a mirror inside a mirror, a hollow inside a hollow, a woman who was nothing inside a man who was nothing inside a city that was nothing inside an Empire that was nothing at all.

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