"What the bottle holds is not the remedy," Elias Whitcombe said, turning the phial between his ruined fingers. "It is the proof. You must not confuse the two."

Margaret Holloway stood at the window of the apothecary, watching the streetcars drag their shadows across the cobbles. Behind her, on the counter, sat the last bottle of her father's golden tincture: a squat glass flask the color of burnt honey, corked and sealed with a thumbprint of red wax. It had come out of the cavity behind the stove, where Walter Holloway had hidden it the night the coroner's men came up the stairs. So far as she knew, it was the only object left in the world that her father had made entirely with his hands, entirely without fear.

"I know what it is," she said. "But the law does not drink proofs, Mr. Whitcombe. It weighs them."

Whitcombe set the bottle down with a surprising gentleness. He had been a surgeon once, and later a professor of materia medica, and the tremors that had ended his career had also ended his certainty in most things—except his certainty about Margaret. She could see illness as a filament, a dark thread sewn through the body's fabric. The board of examiners had called that a delusion. The evening papers had called her the Seer of Wampole Street, which was worse. Her father had called her by her name, and in the whole machinery of the city that had been the only address she ever trusted.

The summons had arrived that morning, folded into a grey envelope with a county watermark. Dr. Augustus Pemberton, chairman of the Medical Board and an examiner for the Court of Common Pleas, requested the presence of Miss Margaret Holloway at the courthouse at four o'clock, in the matter of an affidavit relative to the conviction of Walter Holloway, manslaughter, two years past. The clerk who delivered it had waited in the hallway with his hat in his hands, embarrassed, as if the message itself were a contagion.

"You will go," Whitcombe said, not asking.

"I will go."

"Then go armed." He nudged the phial toward her across the counter. The tincture inside shifted, gold against gold, sluggish as arterial blood. "He was convicted on the claim that the boy who died had drunk this. If you can show the court the bottle, intact, unopened, in your coat—if Pemberton's affidavit admits what he always knew—your father may walk out of that prison before the month is out."

Margaret wrapped the phial in an oilcloth and placed it in the deep pocket of her coat. The glass was cold through the cloth, and she felt her own pulse answer it, the way a tuning fork answers its twin.

The courthouse stood at the heart of the golden downtown, the district of marble banks and insurance towers where every lintel bore a carved anchor or a cornucopia and the scale above the main portal was gilded with enough leaf to buy a district of tenements. Margaret had always thought that scale was a peculiar emblem for a building that spent its days renaming misfortune. The steps were wide and worn; pigeons lifted off them in a gray fan as she climbed. Inside, the corridors smelled of paraffin and old paper, and the floor tiles were arranged in a pattern of radiating spokes, so that every corridor seemed to lead to the hub of the building, and every hub to a locked door.

Pemberton had been given the use of a boardroom on the third floor, a long, ill-ventilated chamber whose walls were hung with portraits of physicians in high collars, all of them dead, all of them authoritative. He lay on a camp bed against the far wall, a blanket drawn to his chin, and the sickness in him stood out to Margaret's sight like a black rope twisted through his lungs. Tuberculosis, in its final month. His hands, folded over his breastbone, were the color of the paper on his desk.

"Miss Holloway." His voice was fine as wire. "I had hoped you would come."

"You would not have sent the letter if you expected refusal." She stood at the foot of the bed, keeping the width of the room between them. The boardroom table was littered with instruments—a stethoscope, a jar of leeches gone dry, a ledger that had not been opened in many months.

Pemberton gestured to a single sheet of paper lying at the center of the table. It was covered in his own hand, and the ink was fresh.

"That is the affidavit," he said. "In it I state that on the night of the eleventh of November, in the year before last, I examined Edward Fennmore, aged seven, and found him suffering from a croupous condition. I prescribed calomel—fifteen grains, in two doses. I did not record that prescription in the case notes. When the child died, I permitted his mother to believe that the tincture compounded by your father had caused the mercury to sublimate into a lethal compound. I allowed that error to stand. I permitted the board to indict Walter Holloway on evidence I knew to be false."

Margaret said nothing. She could feel her heart beating in the roof of her mouth. The phial in her coat was warm now, as if it had absorbed her own heat, and somehow that warmth was unbearable.

"Take it," Pemberton said. "Have it filed this afternoon. I am a dying man, Miss Holloway. I have been persuaded that the truth of my own death is not the only truth I must answer."

She came forward. Her fingers closed on the paper. And because she was what she was—because the filament of illness was not the only thread she could see—the touch of it opened the whole room to her sight. She saw the night in question as Pemberton had stored it: the child's gums bluish-gray, the mercury pooled in the boy's stomach like a drop of his own lost hour. She saw Pemberton's pen hover over the casebook and then turn the page without writing. She saw the board assembled in this very room, smoking and muttering, and she heard one of them say, Low druggist's trade is cutting our fee bill in half; the boy is dead, it is a mercy to have the body to exhibit. She saw them arrive at the word that would become her father's sentence: quackery, incompetence, manslaughter. They had not believed it. They had not needed to believe it. They had needed a name to attach to the boy's death, and Walter Holloway, with his golden tincture and his daughter who saw illness, had been the most convenient name in the ledger.

She opened her eyes. Her hand had not moved, but her grip on the affidavit loosened, and the paper slid back onto the table.

"Miss Holloway?" Pemberton's voice was thin with something—hope, or fear.

"Justice," she said. She was surprised by the sound of her own voice, flat and clear as a struck glass. "You call this an instrument of justice. But the system you served is not a scale, Doctor. It is a ledger. It records only what the powerful choose to debit. My father's conviction was not an error in that system. It was the system working exactly as designed, to protect itself. You are not recanting because you loved the truth. You are recanting because you are afraid to die carrying a weight you can feel." She looked at the paper on the table. "If I file that, the board will oppose it. They will call me a charlatan and my affidavit a deception. You will be dead by then, and they will say you were too weak in the mind to know what you had signed. And my father will remain in prison, because the machine that put him there does not confess—it corrodes."

Pemberton's face was still. For a long moment he was not a dying chairman but a man who had been seen, and the seeing had cost him what remained of his composure.

"Then what would you have me do?" he said.

"Nothing." Margaret turned toward the door, and as she moved, her hand went to the oilcloth in her pocket, and she felt the phial there, whole and golden and unnecessary. "I came here seeking a remedy," she said. "I have found none. The law cannot unmake what it made. It can only pretend, and I will not feed the pretense."

The clerk at the corridor desk rose as she passed, but Margaret went by him without a word, her boots ringing on the radiating spokes of tile. Outside, the gilded scale above the portal was burning in the lowering sun, and the pigeons had returned, and the golden downtown was exactly as it had always been: a district of handsome buildings erected on the proceeds of other people's ruin. She understood that she was leaving the affidavit behind. She understood also that she was leaving behind the last possible form of her father's vindication, the only one the world would have accepted, and that by refusing it she had condemned Walter Holloway to die in prison—if he had not died already.

She walked the four blocks to the county jail through an amber dusk that turned the windows of the banks into mirrors of the oil lamps within. The jail was a brick mass at the end of a cul-de-sac, built low so that the courthouse might appear to stand above it, which was the architecture of the whole city in miniature. The warden, a heavyset man named Healy, knew her by sight. He kept her at the grate, and the words he spoke were practiced, which made them worse.

"Your father passed this morning, Miss Holloway. Pneumonia, the physician said. He was comfortable at the last."

Margaret stood in the corridor and let the words settle into her like a stone into water. She did not need her gift to know it was a lie. Comfort was not a service the county provided. But she had known, climbing the steps of the courthouse, that she would not see her father again. That had been the other knowledge in the affidavit, hidden beneath the mercury and the boy's blue gums: her father's hands, grown thin in the cell, lifted to her face in the dark, and the thread of his own life snapping like a wet cord.

She left the warden without answering. The phial was still in her coat, now weighted with a purpose it no longer possessed. Outside, the street sloped down toward the river, and the river ran the color of tarnished bronze, and the last of the sun was being swallowed by the stacks of the steel mills on the far bank.

Margaret walked to the water's edge, where the dock pilings leaned like old teeth. She unwrapped the phial and held it up before her, and the last light passed through the tincture and broke into red and gold on her hands. It was her father's medicine, compounded for fever, for the shaking sickness, for the heart. It had never cured the one thing that had been killing them both—the city's enormous refusal to see what it did not want to see.

She did not throw the bottle into the river. That would have been a kind of offering, and she had no god to receive it. Instead she let it drop from her fingers onto the cobbles beside the dock, and the glass gave way with a clean, mortal sound, and the golden liquid spread across the stone in a slow fan, thinner than she had imagined, thinner than memory.

She knelt. The glass glittered around her like the scales of the courthouse door, and in the shards, in the smear of gold on the wet granite, Margaret saw what she had come all this way not to see: her father at his workbench, the lamp drawing a circle of light around his hands, the boy's cough in the next room, and Walter mixing the tincture with the concentration of a man doing the only thing he knew to do—make something that might help, even if it could not save. The vision did not accuse. It did not recant. It only held, for the space of a breath, the exact and unassailable worth of a life the system had found convenient to crush.

She stood up, brushed the glass from her knees, and left the shards where they lay. The river took the golden stain slowly, and the dark came down over the mills, and Margaret walked home along the streetcar rails, not pursued, not vindicated, not appeased. She had let go of the last remedy the world had offered, and the world had not noticed. That was the cost of seeing without the power to compel belief. But as she climbed the stairs to the rooms above Whitcombe's apothecary, her eyes still adjusted to night, her heart still beating with the rhythm her father had taught her without ever meaning to, she understood that the seeing had not been taken from her. It was all she had left, and it was enough, barely, to live with—and she would carry it, minute by minute, through the rest of her ordinary, unexonerated life.