Read Chapter 31: The Hidden Codebook

The first shot came through the window before Arthur had finished pocketing the microfilm. Glass sprayed across the table. Mrs. Hartley dropped to the floor with a shout, and Mac was already moving, one hand shoving Arthur toward the rear of the warehouse, the other raising his pistol.

“Back door. Now.”

George fired from the front. The shotgun’s report was deafening in the metal shell of the building, and Arthur heard the answering crack of rifles outside, three, four of them, spaced and professional. Not a rabble. A killing squad.

Mac grunted. Arthur saw him stumble, one hand pressing to his side, blood black against his coat. But he kept moving, half-running, half-limping, urging Arthur through the maze of crates toward the loading bay at the rear.

“Mac, you’re hit.”

“Don’t stop.”

Mrs. Hartley appeared at Arthur’s elbow, wild-eyed, a revolver in her fist that she had not had a moment before. She fired twice toward the front windows, and the shooting outside paused for a beat, just long enough for them to reach the steel door.

George came last, backwards, the shotgun still barking. He slammed the bar down behind them and they were out into an alley, wet cobblestones, the smell of the river, and the cold night air.

They ran. Arthur did not look back. He carried the microfilm in his inner pocket, a sliver of glass and emulsion the size of a thumbnail, and with it the entire weight of what they had decoded. Five days. A month of false invasion panic. The German evacuation plan, timed and detailed, hidden in plain sight.

Mac stumbled again. Arthur caught him by the arm before he could fall, felt the slick warmth of blood soaking through the wool.

“How bad?”

“Bad enough.” Mac’s face was grey in the lamplight. He nodded ahead. “Tube station. Two streets. Go.”

Mrs. Hartley was already moving, glancing back down the alley. The shooting had stopped behind them, which was worse. It meant they were being pursued, not suppressed.

They reached the main road. A few civilians scattered at the sight of them—two men in torn coats, a woman with a pistol, George still carrying the empty shotgun like a club. No police. This part of London, these hours, people knew better than to look too hard.

The tube station entrance gaped ahead, dark and inviting. Arthur allowed himself a breath. Then headlights swept around the corner behind them, and the breath died.

“They’ve got a car,” Mrs. Hartley said. “Go.”

They went down the stairs three at a time, George helping Mac now, Arthur’s hand around the older man’s waist. The ticket hall was nearly empty, one attendant dozing in his booth. They vaulted the turnstiles without slowing, and the sound of an engine stopped at the curb above.

“Split,” Mac rasped. “They’ll follow the blood.”

Arthur looked down. Mac’s trail was a spatter of dark drops across the white tiles, unmistakable.

“No,” Arthur said.

“Yes.” Mac shoved the rolled codebook into Arthur’s free hand. Hard, insistent. “You carry it. You don’t stop for anything.”

“Mac, you’ll bleed out.”

“I’ll hold them long enough. Go down. George, get him to the platform.”

George met Arthur’s eyes for a moment, and Arthur saw in them the same understanding that had passed between them a hundred times on the decks of fishing boats—when the sea demanded something, you surrendered to it or it took everything.

“Come on, Arthur.” George grabbed his elbow. “He’s right. You’re the message.”

Arthur let himself be pulled away. He turned once, saw Mac lean against the wall, pistol raised toward the stairs, blood pooling at his feet. Mac nodded once, a short, final gesture.

Arthur ran.

He and George burst onto the platform as a train rattled in, doors opening. They threw themselves aboard. Arthur did not know which line this was, did not care. He pressed his back against the carriage wall and gasped for air, the microfilm still clutched in his fist, Mac’s blood still warm where his hand had touched Arthur’s.

The doors slid shut. The train pulled away.

George crouched opposite him, shotgun broken open, spent shells on the floor. “We lost them?”

“For now.” Arthur forced his hands to still, forced the shaking to stop. His mind was already working. They could not go back to the network. The warehouse was compromised. Whitmore’s leak had been a junior officer, but someone had pointed the enemy at them twice now.

Michael. His son had told him something, months ago, before the war had truly begun. A joke between them, an old sailor’s superstition about the sea keeping secrets. Michael had laughed and said that the Navy kept its secrets better, and that if Arthur ever needed to reach him in an emergency, there was a number, a direct line to a shore station contact who had his back.

Arthur had laughed too, at the time. A father receiving coded reassurance from his own son.

He went through the train, carriage to carriage, until he found a public telephone fixed to the wall of the vestibule between compartments. He pulled coins from his pocket, fingers clumsy, and fed them into the slot.

The number. He recited it in his head as he dialed: the three digits had come to him in the dark of a trawler’s wheelhouse, Michael’s voice bright and young and alive, and now they were the only thing between Arthur and the abyss.

It rang. Once. Twice.

A woman answered. Her voice was crisp, unhurried, like a well-oiled machine idling.

“Yes?”

Arthur opened his mouth. Every instinct screamed caution—the woman at the warehouse, the traffic on their route, the leaks in the Admiralty itself. But the codebook was in his hand, the microfilm in his pocket, and he had run out of roads to trust.

He said the phrase Michael had given him. Low, steady, the words of an old maritime prayer his own father had taught him, which he had passed to Michael, which had come back to him now as a key:

“The little ship answers when the big ships are silent.”

There was a pause. A single breath.

Then the woman said, “Hold the line, Briggs.”

Arthur closed his eyes. The train rattled on through the dark of the tunnel, and somewhere behind them, Mac lay bleeding on a tile floor with a pistol in his hand, buying the time Arthur had just spent.

He had better be worth it.