Read Chapter 25: The Sunken Chapel

The boat rocked gently, a patient cork on the pale green water. Pierre, the fisherman the old woman had sent them to, stood at the prow, squinting at the small screen of the borrowed sonar unit. James huddled beside him, the collar of his coat turned up against the damp, while Elodie sat in the stern, her fingers absently tracing the carved wooden cross in her pocket. The silver one, Marguerite’s, hung warm against her collarbone, a low, steady heat that had not faded since they left the village.

“There,” Pierre said, his voice a low rumble. He tapped the screen with a weathered finger. A grey smudge, too regular to be rock or weed, pulsed at the edge of the sonar’s range. “Old walls, maybe. Corner of it.”

James leaned in, his breath fogging the plastic screen. “Depth?”

“Six, maybe seven meters. The current shifts the silt, covers the rest.” Pierre straightened, looking out at the water. The Loire here was wide and unassuming, a moving sheet of brown and silver that gave no hint of the drowned chapel beneath. “The dam, she releases upstream. Not on a schedule. We have perhaps an hour of calm. If the water decides to turn, you must leave the bottom. Immediately.”

Elodie stood, the boat swaying beneath her. “We understand.” She looked at James. He met her gaze, the fragile truce between them held taut. There was no trace of the accusation from the Bodleian, only the focused intensity of a scholar facing a primary source. He nodded once.

They geared up in silence—wetsuits borrowed from the scientist’s shed, weight belts, tanks that felt heavier than they should. Pierre checked their regulators with an expert’s impatience, then handed James a powerful underwater torch.

“The entrance,” Pierre said, pointing to a spot a few meters off the port bow. “You will feel the altar stone ahead. It is the only thing standing whole.” He paused. “The grandmother of my grandmother, she spoke of it. A house of God for the river folk. They did not want it gone.”

Elodie pulled her mask down, tasting the cold rubber. She looked at the cross again, the silver one. The warmth on her skin seemed to thrum in answer to the water below. *Meet me at the crossing of the Loire. Follow the Loire.* This was it. This was the crossing.

With a synchronized step, they went over the side.

The cold was a physical blow, a shock that compressed her chest and stole her breath. The world dissolved into a muffled, green-brown silence. She kicked, evening out, and the silt swirling around her feet slowly cleared. James was a dark shape beside her, his torch a pale beam cutting through the murk.

They descended, following the gentle slope of the riverbed. Elodie’s fins stirred ancient sand, and the silver cross swung against her neck, a point of bright heat in the cold. She focused on that warmth, using it like a compass needle. Down. Toward the centre of the channel.

The sonar’s ghost resolved into stone. A wall, tilted and furred with green, emerged from the gloom. It was not rubble. It was a worked surface, stones fitted with a precision she had only seen in great cathedrals. She reached out, her gloved hand brushing the cold rock, and felt the unmistakable edge of a window arch, now clogged with sediment.

James swam ahead, his torchlight tracing the outline of a doorway. He paused, his body angled back toward her, and gestured. She kicked toward him and saw it—not through the doorway, but beyond a collapsed section of wall. A block of darker stone, massively solid, stood upright amidst a field of toppled columns. The altar.

Her heart hammered against her ribs. The warmth at her throat intensified, a sharp, undeniable flare. She swam past James, entering the sunken nave. Fish scattered from the altar’s base. The stone was carved, but the detail was softened by a layer of fine brown silt. She swept her hand across it, and the silt billowed up in a cloud, momentarily blinding her.

When it cleared, James’s torch was on her, and she saw what her touch had revealed.

In the center of the altar, carved deep into the stone, was a small niche. It was not empty. A box sat within, the size of a shoebox, crusted with mineral deposits and the black-green of ancient lead. The light caught its edges, and Elodie saw that it was not formless. It was made with intent, its corners folded with a craftsman’s care. A lead casket.

She hovered, frozen. This was it. This was what Marguerite had hidden. The postscript, the ferryman, the sunken chapel—all of it had led to this cold, quiet box.

James swam closer, his face a pale mask behind his glass. He reached out, his gloved fingers hovering over the casket’s lid, then stopped. He looked at her, his eyes asking the question his voice could not: *Do we take it?*

Elodie looked at the niche. Then she saw something else. A thin chain, braided and delicate, was looped around the casket’s base, almost invisible against the stone. She followed it with her eyes. It disappeared into a crack in the altar. Her hand went to her own neck, where the chain of the silver cross hung. It was the same weave.

*My treasure is sealed by the heart that wore the cross.*

The altar was the heart. The chain was the seal.

She reached for the casket, her fingers trembling with more than cold. The box was heavier than it looked, dense and solid. She gripped it with both hands and pulled. It came free with a soft, grinding protest, leaving the thin chain behind in its niche. She tucked the casket against her chest, the cold lead pressing against the warm silver cross.

James gave her a thumb’s up, a gesture of pure triumph. She returned it, and they began their ascent.

The light grew from a suggestion to a sickly yellow as they broke the surface. Elodie gasped, the air feeling thin and sweet. Pierre was leaning over the side, his hand outstretched. She passed him the casket first, then hauled herself up over the gunwale, the wetsuit a second skin of cold water.

James surfaced a moment later, spitting out his regulator. He was shaking, his teeth chattering audibly, but his eyes were alive, blazing with a fierce, boyish excitement. They knelt on the floor of the boat, water pooling around them, staring at the lead box.

Pierre took a step back, crossing himself. He said nothing, but his eyes were wide.

Elodie ran a hand over the casket. The lid was not sealed with any lock, but with lead folds, pressed and hammered down. Centuries of water had done their best to seal it further, but she could see the seam.

“We need to open it,” James said, his voice thin.

“Not here,” Elodie said. She was shaking violently now. The cold was seeping into her bones. “Back at the hotel. Slowly. Properly.”

James nodded, reluctant, as Pierre revved the small outboard motor. The boat turned, pointing back toward the village. The sun was beginning its descent, painting the water in shades of gold and bronze.

Elodie clutched the casket to her chest, feeling the warmth of the silver cross against the cold metal. The chain—the second chain, the one she now knew was in the niche—was gone. But the feeling remained. *Meet me at the crossing.* They had. And they had found what Marguerite had left.

As the boat cut through the water, a thought struck Elodie, cold as the river. The niche was sealed with a chain. The altar was intact. Everything was as it had been left. Which meant, despite the elderly woman’s story, despite the two years that Finch had been searching the region, he had not found this place.

But the train incident would have been reported by now. A search party, a punctual official. And if Henri had been right, Aldous Finch would soon hear a tale of two scholars who had disembarked illegally in the heart of the Loire valley.

The race was no longer academic. It was a race to a hotel room, to a lead casket, to the truth. And the man who had chased this truth for two years knew exactly where they were.