July 3rd dawned hot and still. Clara woke to the Union Army stirring—the “decisive day” had arrived. Jude and Flynn were already hunched over their grandfather’s notes.

“The note from ‘M,'” Jude said without preamble. “The handwriting is familiar. I’ve seen it before.”

“Later,” Clara urged. “We have to find the machine parts before the fighting moves south to Cemetery Ridge. It’s a risk we have to take.”

A single cannon boomed, then another. The bombardment had begun.

General Chamberlain arrived an hour later, face drawn. “My regiment is moving to the center,” he said. He had arranged for Mrs. Weikert, a local who knew the terrain, to guide them to the crash site. “Godspeed,” he told them. “I’ll find you when this is over—if I can.”

Clara watched him walk toward the guns. In her history, he became a hero and a governor. Here, he was just a man walking into a storm of lead.

The walk to the woods took an hour under a sky thundering with the “biggest bombardment of the war.” Amidst the underbrush, they found the debris. After twenty minutes of searching, Flynn emerged from a thicket holding a battered copper cylinder.

“The temporal stabilizer!” Jude grabbed it. “Without this, any window we open would collapse.”

They salvaged what they could—gears, wires, and crystals—though the field generator was still missing. “I can work with this,” Jude said, cautiously optimistic. “I need a day to assess it.”

Suddenly, a primal roar rose from the south.

“Pickett’s Charge,” Mrs. Weikert whispered. “The infantry assault has begun.”

From the tree line, the fields were a nightmare. Clara had read the statistics, but the reality was soul-crushing: neat gray lines of men shattering under artillery, smoke choking the air, and the terrible screams of twelve thousand soldiers marching into a “High Water Mark” that looked more like a mass grave.

By evening, the guns fell silent. The siblings huddled in the hayloft above a barn-turned-hospital. Chamberlain appeared at the top of the ladder, looking like a ghost, his uniform blackened by powder.

“It’s over,” he rasped. “Lee is broken. But I lost thirty-three men today.”

After a heavy silence, Jude asked to see the General’s diary. He compared it to the assassination warning.

“Look at the capital T,” Jude pointed out. “Your hand has a small hook at the top. The letter doesn’t. And the pressure is lighter. It’s a forgery.”

“But why forge a warning about an assassination that hasn’t happened?” Clara asked.

“To distract us,” Jude realized. “We’ve been so focused on Lincoln that we haven’t asked how the Confederates knew we were here, or who ‘M’ is. Someone wanted us looking the wrong way.”

Chamberlain’s eyes grew grave. “I’ll have my scouts look for agents. You finish that machine. But be careful—whoever did this is watching you.”

As the General left, the siblings settled into the hay. Outside, the farm was finally quiet, but Clara stayed awake, staring at the rafters.

Whoever you are, she thought, we’re going to find you.

The sun was setting as they approached the Thornton farm.

It lay hidden in a hollow between two hills, a small white farmhouse with smoke rising from the chimney. Charlie, the Confederate drummer boy, had given them the name: Margaret Thornton. M.

“She’s home,” Jude said quietly.

They’d left Charlie at the prisoner camp with strict instructions to tell no one. General Chamberlain had provided horses and a pass through Union checkpoints, though he expected a full report by morning.

The front door opened before they reached the porch.

The woman who stepped out was perhaps sixty, her gray hair pulled back severely, her face lined with intelligence and calculation.

“I wondered when you’d come,” Margaret Thornton said. “The Martin children. I’ve been expecting you.”

The interior of the farmhouse was surprisingly technological. Strange devices cluttered every surface, and a large humming machine dominated the back wall.

“You’re from the future,” Jude said.

“2039, to be precise. I was a historian—specializing in the Civil War and time travel.” Mrs. Thornton settled into a chair. “Your grandfather and I were colleagues once, before our disagreements became irreconcilable.”

“The Thornton Paradox,” Jude said. “Papa named it after you.”

“After my research, yes. William sees time travel as a tool for observation. I see it as something more—a tool for correction.”

“Correction of what?”

“History’s mistakes.” Her eyes gleamed. “The Union victory set in motion a century of suffering. I came back to give the Confederacy a fighting chance—to change the trajectory.”

“By preserving slavery?” Clara felt sick.

“By creating a different path. A Confederate victory would have led to negotiated peace, gradual modernization.” Mrs. Thornton’s voice was passionate. “I’ve studied the alternatives. My way leads to a better future.”

“That’s insane,” Flynn said.

“Your grandfather thought so too. That’s why he sent you to interfere.” She smiled coldly. “But he made mistakes. Sent you to the wrong moment.”

“The forged letter,” Jude said. “The assassination warning—you wrote it to distract us.”

“A necessary misdirection while I completed my real work.” She shook her head. “It didn’t work as well as I’d hoped. Lee lost anyway.”

“Then what’s Operation Independence?”

Mrs. Thornton moved to the humming machine. “Tomorrow’s finale. Not assassination—revelation. President Lincoln will receive documents from the future, proving that Union victory leads to a century of division. Documents that might convince him to seek peace instead.”

Clara’s mind raced. This wasn’t murder—it was manipulation. Even if they stopped her tomorrow, she’d simply try again. Unless…

“Your machine,” Clara said. “If we destroy it, you’re stranded. No more messages. Your plan falls apart.”

Mrs. Thornton laughed. “You’re welcome to try.”

Clara drew Chamberlain’s pistol. Mrs. Thornton lunged for the controls. Flynn dove forward. And Jude, acting on instinct, grabbed a heavy brass cylinder and hurled it at the machine’s central housing.

The impact rang like a bell. The hum rose to a scream.

“No!” Mrs. Thornton shouted. “You fools!”

The machine exploded.

Clara woke to ringing ears and destruction.

The farmhouse was demolished—walls collapsed, roof caved in, Mrs. Thornton’s machine reduced to twisted metal. But Flynn was alive, bleeding from a cut on his forehead. And Jude—pinned under a beam, his leg bent at a terrible angle, but breathing.

“Mrs. Thornton?” Flynn asked as they freed Jude.

Clara looked around. The woman was gone.

“We need to get back,” Jude gasped. “Tell Chamberlain. The documents she was planning to give Lincoln—they might still be out there.”

They carried Jude to the horses and rode for the Weikert farm, knowing they’d stopped Mrs. Thornton’s immediate plan but not the woman herself.

And somewhere out there, her “asset” was still waiting.

July 4th, 1863, dawned clear and hot.

Clara hadn’t slept. The asset—whoever Mrs. Thornton had recruited to deliver her documents to Lincoln—was still unknown. And the President would arrive within hours.

“We watch everyone,” Clara told Chamberlain. “Every person who gets close to Lincoln. Every document that changes hands.”

The ceremony was held in the town square, thousands gathered to honor the dead and celebrate victory. Lincoln himself was taller than Clara expected, his face lined with weariness, his dark eyes missing nothing.

The speeches began. General Meade spoke of bravery. General Howard described the victory’s significance. Clara watched every face, every movement.

Then Lincoln rose to speak.

His voice carried across the square—words about sacrifice and unity that Clara half-remembered from history class. And as he spoke, she saw it.

A young officer edging through the crowd toward the platform. His movements too purposeful, too directed. He was carrying something.

“Flynn. Two o’clock. The lieutenant.”

Flynn’s eyes found him. “He’s got documents.”

Clara didn’t hesitate. She pushed through the crowd, closing the distance. The officer reached the platform’s edge just as Lincoln finished.

“Mr. President! Documents from the War Department! Urgent!”

Lincoln’s hand reached out—

Clara crashed into the officer, sending them both sprawling. The portfolio flew from his hands, papers scattering everywhere. Guards rushed forward.

“He’s an assassin!” Clara shouted. “Check the documents!”

Chaos erupted. Guards held them both at gunpoint while soldiers gathered the papers. Then Chamberlain appeared, holding Papa’s notes.

“Sir, these papers aren’t from the War Department. They’re fabrications from the future—designed to manipulate your decisions.”

Lincoln read everything in silence—the forged letter, the temporal mechanics notes, the intercepted messages. Then he looked at Clara.

“You’re one of the travelers from another time.”

“Yes, sir.”

“And you came to protect me?”

“To protect history, sir.”

Lincoln smiled. “Then perhaps we should talk.”

In a small room in the Gettysburg town hall, they told Lincoln everything. The time machine. Mrs. Thornton. The paradox. The President listened without interrupting.

“This Mrs. Thornton believed she was fixing history,” he said finally. “Making a better future.”

“She was wrong,” Clara said firmly.

“Perhaps. But history is not simple, children. Who can say with certainty what path leads to the best outcome?”

“We know the Union wins,” Jude said. “We know slavery ends. We know the nation survives. Those are facts worth protecting.”

Lincoln smiled that weary, wondering smile. “You remind me of my own sons. Young, fierce, absolutely convinced the world can be made better.” He stood. “Perhaps that’s what we need most.”

“What will you do with the documents?” Clara asked.

“Destroy them. Such things would only cause confusion.” He moved to the door. “As for Mrs. Thornton—I’ll have my people watch for her. But I suspect she’s retreated to try again.”

“We’ll stop her,” Clara said. “Whatever it takes.”

“I believe you will.” Lincoln paused. “But remember—this is not your battle to fight permanently. You have your own future to return to. History will remember this day as a victory. Let it remember you as heroes who went home.”

He left. The room fell silent.

“He’s right,” Flynn said. “We need to focus on the beacon. Get home.”

Clara wanted to argue. But looking at Jude’s pale face, at everyone’s exhaustion…

“Okay. We focus on going home.”

“And if Mrs. Thornton tries anything else?”

“Then we stop her again. That’s what Martins do.”