Chapter 92: THE ARITHMETIC OF WINDOWS

The mirror's glow did not fade. It deepened, as though the glass had swallowed a candle and refused to let it die.

Louis did not step back. That was the thing about the King—he had been taught since infancy that retreat was a language spoken only by other men. He stood at the threshold of the depot with his arms folded and his chin lifted, and the grey light painted his face in colors no painter at Versailles would have dared to mix.

"Windows," he said at last. "You speak in riddles, Marchand. I have tolerated it because your riddles have fed armies. But the hour is late, and I have ridden from Marly with mud on my boots."

"Your Majesty has mud on his boots because the earth opened," Marchand said. "And because a man wearing my face has been asking for your seal."

The King's expression did not change. That was worse than anger. Anger could be navigated. This was the stillness of a man recalculating a siege.

"Colbert told you," Louis said.

"Colbert told me nothing. Colbert asked me a question about the binding of my first ledger. He was testing whether I was myself." Marchand touched the cross at his chest. "Someone wearing my face is walking toward your throne. Someone who has read my ledgers but not my memories. And the depot—Your Majesty, the depot is no longer a place. It is becoming a door."

"It has always been a door."

"No. It has always been a *key*. A key locks. A door opens. There is a difference, and the difference is everything."

Behind him, in the depths, the mirror pulsed again. Marchand felt it against his spine like a heartbeat not his own. The boy was there. The boy had stepped from the light of an Ardennes autumn and held out his hand, and then the King's soldiers had come with orders to seal the depot, and the door had remembered instead of opening.

Now the soldiers waited in a ring beyond the gate, torches guttering in the wet wind. Marchand could hear the horses. He could hear the creak of leather and the low murmur of men who did not know what they were guarding.

Louis uncrossed his arms. "You told me once that you built a transmitter to call home. You turned a key in your son's chest and the storm spoke. Now you tell me you are building a window. What is a window, Marchand, but a door that cannot be locked?"

"A door that can be *seen through*," Marchand said. "A door that lets in light without letting in the flood. Your Majesty, the storm is not moving. It is waiting. It waits for a key to turn. Every time we turn a key—every time we seal, every time we lock—we teach it the shape of its cage. And it is learning."

Louis was silent for a long moment. Then he said, very quietly, "You are asking me to leave a door open in my kingdom."

"I am asking you to leave a *window* open. There is a difference."

"You keep saying that."

"Because it keeps being true."

The King turned and looked back toward the road, toward the torches, toward the black line of forest that hid Versailles like a held breath. When he spoke again, his voice had changed. It was the voice of a man who had decided something and would not be moved from it.

"My grandfather would have burned this place," he said. "My father would have bricked it up and posted guards for a century. I am not my grandfather. I am not my father. I am the King, and I have learned that the things I do not understand are the things that keep me on my throne."

He looked at Marchand.

"One window," he said. "You will build it here, under my authority, and you will show me what it sees. If it sees my enemies, I will use it. If it sees my death, I will know. If it sees your son—" He stopped. "If it sees your son, Marchand, you will tell me why a child from three hundred years hence is worth more to you than the seal of France."

Marchand did not answer. He could not. The cross was warm, and the mirror was glowing, and somewhere in the grey shimmer beyond the stars, his boy was waiting.

"Your Majesty," he said at last, "I will show you the window. But you must understand something first. The window does not belong to me. It does not belong to you. It belongs to the ledger."

"The ledger again."

"The ledger is not a book, Your Majesty. It is a *record*. Every time we write in it, we change what the window sees. Every time we turn a page, we turn a key. And there are two hands writing in it now—mine and another's—and I do not know which of us is writing the ending."

Louis stared at him. The wind rose. Somewhere beyond the ring of torches, a horse whinnied and stamped.

"Then we must find out," the King said, "before the other hand finishes the sentence."

He turned and walked back toward his guards, his boots leaving prints in the wet earth that the rain would erase before dawn. Marchand watched him go, and then he turned back to the depot, and the mirror was waiting.

The glass rippled. The older Marchand was there again—the weary face, the grey eyes, the mouth that had forgotten how to smile. He was writing in the ledger. Marchand could see the pen moving across a page that should not exist.

*The window is open,* the older Marchand wrote. *The King has agreed. The boy is waiting. But the other hand has already turned the page.*

Marchand stepped closer. The mirror did not reflect him. It reflected a room he had never seen—a room with a window, and beyond the window, a sky full of grey light.

"Who are you?" he asked.

The older Marchand looked up. For a moment, his face was not weary. It was afraid.

*I am the arithmetic,* he said. *I am the sum of every choice you have not yet made. And I am running out of numbers.*

The mirror went dark. The ledger appeared on the table beside it, open to a page that had been blank a moment before. New lines were forming in a hand Marchand did not recognize—a hand that wrote with the precision of a clerk and the hunger of a king.

*He is coming. He wears your face. He carries your key. And he has learned to count windows.*

Marchand closed the ledger. His hands were steady. His heart was not.

Outside, the rain began. It fell on the depot roof like the sound of a thousand fingers drumming on a door. And somewhere in the dark, a man wearing Marchand's face was walking toward Versailles, carrying a key that remembered everything.