9. Canvas of the Dead

The hermitage was silent except for the scrape of Simo's brush.

For three days he had barely moved from his mat. The old monk Xuanjing brought him rice and tea at intervals he did not measure, setting the bowls beside his knee and withdrawing without a word. The ledger lay open on the low table before him, its columns of names and dates and places illuminated by a single oil lamp that he kept trimmed so low the flame was barely more than a blue whisper. Beside it, on a sheet of fine paper no larger than a man's hand, he was creating the copy that would travel to Chang'an.

He worked with a brush so fine it had only three hairs, a tool his master had given him on the day he completed his apprenticeship. "For the truth that must be told small," the old painter had said, pressing the brush into his palm. At the time, Simo had thought it was a proverb, one of the cryptic sayings his master was fond of. Now he understood. The brush had been made for precisely this purpose—for hiding a confession inside a sutra scroll, for smuggling evidence past men who would kill to suppress it. His master had been preparing him for this moment for ten years, and he had not even known it.

By the afternoon of the second day, the copy was complete. Simo had reduced the forty-seven names, the dates, the places of origin, the coded entries from the cipher section, into a block of characters so small they resembled the footprints of an insect walking through ink. He had left space around the edges for the sutra text that would be written over it, the holy words that would shield the unholy truth beneath. When the monks began their transcription of the Diamond Sutra, they would write directly over his hidden layer, never suspecting that the paper they blessed with scripture already carried a record of murder.

He set down the brush and flexed his fingers. The joints ached from days of minute movement. His eyes burned. But the copy was perfect, and now, at last, he could turn his attention to the other task that Xuanjing had given him.

Yuchi Danqing's painting stood against the wall of the hermitage, propped on a makeshift easel of cypress branches. It was not large—perhaps three hand-spans wide and twice as tall—but it had a presence that filled the small room. The bodhisattva gazed out from the faded silk with eyes that seemed to follow Simo wherever he moved, their expression shifting in the changing light. Sometimes they looked sorrowful. Sometimes they looked expectant. Sometimes they looked like the eyes of a man who had been dead for fifteen years, waiting for someone to finally see what he had hidden.

Simo had examined the painting a dozen times since Xuanjing gave it to him. He had studied it in morning light and noon light and the amber glow of sunset. He had tilted it at every angle, held a lamp behind it, traced its surface with his fingertips. He could feel the hidden layer beneath the paint, the faint resistance that told him something had been painted over. But he could not see what it was. The obscuring wash was too thick, or the pigment beneath was too faint, or both.

He needed to remove the overpainting. But this was not like the scroll from Zhang Weiren, where the hidden layer was only a small section beneath the pavilion. This was the entire painting. To strip away the surface would be to destroy Yuchi's last work, the portrait he had painted as a gift for his friend. And Simo was not certain he had the right to do that, even to uncover the truth.

"You are struggling," Xuanjing said from the doorway. The old monk had returned with the evening rice, a bowl of plain gruel and a cup of bitter tea. "I can hear it in your silence. It has a different quality than the silence of work."

"I do not want to destroy the painting."

"Yuchi wanted you to. He told me, when he gave it to me, that the surface was a lie. He said the truth was underneath, and that the surface existed only to protect it until the right person came. You are the right person. The cicada seal proves it."

Simo looked at the bronze seal on the table, still stained with the mud of the canal. Yuchi Danqing had carved it, when he still believed the network was only a workshop for high-quality copies. He had put his art into it, his skill as a metalworker, his hope for a future where painters could make an honest living copying the old masters. And then he had discovered what the network really was, and he had tried to destroy the seal, and they had killed him.

"I will do it," Simo said. "But I need solvents. Water and alcohol, carefully mixed. And I need time. If I rush, I will damage the hidden layer as well."

"Take the time. The pilgrims do not leave until tomorrow evening. And Shi Yan has not returned."

Simo had been trying not to think about Shi Yan. The enforcer had been gone for two days, walking back into the city that wanted him dead, offering himself as bait to draw Li Yao away from the hermitage. There were a dozen ways he could have died, a hundred. But Simo could not afford to grieve. Not yet. Not until the evidence was on its way to Chang'an.

He prepared the solvent with the care of a physician mixing medicine. Water from the temple well, boiled and cooled. Alcohol distilled from sorghum, borrowed from the temple's infirmary. A drop of gum arabic to control the evaporation. He tested the mixture on a corner of the painting where the surface layer was thinnest, applying it with a brush of soft goat hair and waiting, his breath held, as the obscuring wash began to loosen.

The pigment lifted. Beneath it, something glowed.

It was a red so vivid, so alive, that Simo flinched back from the painting as though it had burned him. He had seen Crimson Lake before—in the pellets Zhang Weiren had carried, in the cakes drying in Li Yao's workshop, in the faint traces that bled through the hidden layer of his master's scroll. But this was different. This was not the red of dried blood, the rusty brown that most organic pigments became over time. This was the red of fresh arterial spray, bright and hot and screaming. It had been buried for fifteen years, and it had not faded at all.

"Yuchi painted the hidden layer in Crimson Lake," Simo said, his voice barely audible. "He used the pigment they killed him for."

Xuanjing came to stand beside him, his clouded eyes straining to see what Simo saw. "What is the image?"

"I cannot tell yet. I have only uncovered a corner. But the color—it is not like the Crimson Lake I saw in the workshop. It is brighter. Deeper. There is something different about it."

He worked through the night. The surface layer peeled away in thin, translucent sheets, curling like shed skin as the solvent did its work. The bodhisattva's serene face dissolved. The flowing robes disappeared. The gold-leaf halo flaked away and fell to the floor like scattered coins. And beneath them, inch by agonizing inch, the hidden image emerged.

It was not a single image. It was a diagram.

The painting showed a cross-section of the earth, a cutaway view of the kind that mining engineers used to map underground tunnels. At the top was the surface of the ground, indicated by a thin line of green pigment that had faded almost to grey. Below it, layer after layer of rock and soil, each one rendered in a different shade of brown and ochre. And at the bottom, far below the surface, was a chamber. A cave, or a vein of mineral, or something else entirely. It was filled with the glowing red of Crimson Lake, and from it, lines of red radiated upward through the rock like roots, or veins, or the branches of an upside-down tree.

Beside the chamber, written in characters so small they could barely be read, was a single line of text: The color is not in the blood. The blood is only the carrier. The color is in the earth, and the earth is alive.

Simo sat back on his heels, his heart pounding. "He was not mining a mineral. He was mining something else. Something that was already red. Something that did not need human blood to make its color."

"The mineral he claimed to have discovered in the Heavenly Mountains," Xuanjing said. "He told the network it was a stabilizer. He told them it preserved the blood and kept the color from fading. But he was lying. The mineral was the true source of the red. The blood was a decoy."

"A decoy. To make the network think they needed to keep killing. To make them dependent on a process that was completely unnecessary." Simo stared at the diagram, his mind racing through the implications. "Yuchi discovered that Crimson Lake could be made without blood. He told the network. They did not care. They had already built their business on murder. The blood was not a flaw—it was a feature. It was the terror that gave the pigment its mystique, its rarity, its value. Collectors paid more for paintings made with human suffering. The network was not going to give that up just because a Khotanese painter had found a humane alternative."

"So they killed him."

"They killed him, and they buried his discovery, and they kept making Crimson Lake from the blood of innocent people because the blood was what made it profitable." Simo looked at the diagram again, at the glowing red chamber beneath the earth, at the lines radiating upward through the rock. "But Yuchi left a map. He painted the location of his mine. The true source of the red. And he hid it in a painting he gave to his best friend, knowing that one day someone with the cicada seal would come to find it."

Xuanjing was silent for a long moment. Outside, the cypress branches stirred in the pre-dawn wind, and a night bird called once and was still.

"There is more," the old monk said finally. "Yuchi told me, on the night before he died, that the mineral was not a mineral. He said it was a living thing. A fungus, or a mold, or something that had no name in any language he knew. It grew in the darkness beneath the mountains, spreading through the rock, feeding on the heat of the earth. When it was ground and mixed with oil, it produced the most beautiful red in the world. But it could not survive outside its cave. It died within days of being extracted, and the color died with it. Yuchi spent years trying to find a way to preserve it. He eventually discovered that mixing it with fresh human blood kept it alive indefinitely. The blood was not the source of the color. It was food. The fungus fed on it, and in return, it continued to produce its crimson light."

Simo felt the world tilt around him. "The victims in the pit. They were not being used for their pigment. They were being used to keep the fungus alive."

"Yes. The network found a way to culture the fungus, to keep it growing in the darkness of their cellar. But it required a constant supply of fresh blood, taken from living bodies while the terror still ran hot. Yuchi wanted to destroy the culture. He wanted to seal the mine and bury the fungus forever. The network refused. And so he made this painting—a map to the source, and a warning about what it really was."

Simo looked at the glowing red diagram on the silk, at the vein of living color that pulsed beneath the earth like a buried heart. He thought of the workshop beneath the weaving hall, the pit, the apparatus of bronze and bamboo. He thought of the forty-seven names in the ledger, the people who had been buried alive and drained of blood not for their color but for their fear. He thought of his master, who had helped kill the first victim and spent the rest of his life trying to atone.

And he thought of Li Yao, who was still out there, still hunting, still feeding the fungus with the blood of the innocent.

"I need to destroy it," Simo said. "The fungus. The workshop. Everything. If the network survives, they will find a way to continue. They will find new victims. They will keep feeding the darkness forever."

"Then you will need help," said a voice from the doorway.

Simo turned. Shi Yan stood at the entrance to the hermitage, his clothes torn and muddy, a fresh scar running from his temple to his jaw. He looked like a man who had walked through a battlefield and come out the other side not quite whole. But his eyes were clear, and his knife was clean.

"You are alive," Simo said.

"Barely. Li Yao sent six men after me. They are all dead. I am not." Shi Yan stepped into the hermitage and lowered himself onto a mat, his movements stiff and pained. "But he knows. He knows the ledger is gone. He knows someone has seen the hidden layer in Yuchi's painting. He is burning documents, destroying evidence, preparing to flee. If we are going to act, it must be tonight."

"Tonight?"

"He is at the weaving hall, overseeing the destruction. The workers have been dismissed. The guards have been doubled. He is going to seal the cellar and bury the pit and disappear into the desert. If we let him go, we will never find him again."

Simo looked at the painting, at the glowing diagram of the underground chamber, at the map that led to the source of the horror. Then he looked at Shi Yan, the killer who had murdered three men for the network and was now the only ally he had left.

"We are not going to let him go," Simo said. "But we are not going to the weaving hall to fight. We are going to the mine. The source. Yuchi's map shows the location. If we can destroy the fungus, we destroy the network's reason for existing. Without the pigment, Li Yao is just another criminal with blood on his hands. The evidence in the ledger will be enough to convict him. But the fungus—that is what makes him powerful. That is what must die."

Shi Yan stared at him for a long moment. Then he nodded slowly.

"There is a path into the mountains," he said. "A smuggler's trail that follows the old riverbed. It will take us to the mining camps above the tree line. If Yuchi's map is accurate, the cave should be somewhere in that region. We can leave tonight, before Li Yao realizes we are not in the city."

"Three of us," Xuanjing said. "I am old, and my eyes are clouded, but I knew Yuchi better than anyone. I can identify the landmarks in his diagram. And I have been waiting fifteen years to finish what he started."

Simo gathered his brushes and his pigments and the fine-haired brush his master had given him. He gathered the ledger copy and gave it to Xuanjing, who promised to deliver it to the pilgrim monks before they departed. He gathered the cicada seal and the hidden painting and the map that glowed with the color of buried light.

And then, as the first grey light of dawn touched the cypress grove, the three of them slipped out of the hermitage and began the long walk toward the mountains, where a fungus that fed on fear was waiting in the darkness, hungry and alive and not yet ready to die.