A Knock Beneath the Gauge

The register had a folded leaf stitched into its spine, thin enough to pass for a repair patch.

Nadia found it while Oliver held the book open against the signal house’s slanted desk. The page beneath the first-departure entry had already given them the essential sequence: Mercy had left unnamed, the cab had replied, and the fixed post had answered afterward. Seris’s warning against calling the first sound an echo was written in the margin. The folded leaf was hidden under the binding thread, where the paper had darkened with age.

“Is it part of the register?” Oliver asked.

“It was stitched into it.” Nadia eased the paper free without tearing the thread. “That’s all I can say yet.”

The leaf carried three cramped lines in Seris’s hand. The first recorded the post’s response. The second described a check of the pressure gauge and cab fittings. The last was written in a hurry, with the pen pressed hard enough to score the paper.

*Cab-side reply came from beneath the gauge plate. No movement at the whistle fitting. Do not list it as a second post.*

Oliver read it twice. The old entry had narrowed the possibilities; this one gave them a place.

Nadia kept her finger beside the words without touching the ink. “She checked the whistle.”

“She checked it after the reply.” Oliver followed the scored line with his eyes. “And she thought someone might mistake it for another post.”

“She was careful about what she could prove.” Nadia folded the leaf back along its old crease. “That part of her I believe.”

Oliver tucked the page into the register and closed the cover. He had come looking for a name, though he had never said so aloud. The note gave him no name. It gave him a location, and a warning against turning the sound into something convenient.

They left the signal house by the same hand line they had used to reach it. The broken landing remained below them, its outer stones hanging over the open span. Nadia went first, testing each knot before she shifted her weight. Oliver followed with the register’s wording held in his mind, taking care not to let the book knock against his coat.

Mercy waited on the eastern ledge with its engine quiet. The track behind it still held the crossing they had proved under full load. The hoist cable lay slack and damaged where they had left it. Nothing in the engine’s posture suggested it had noticed their absence.

Oliver climbed into the cab and went straight to the pressure gauge. The crescent-marked fitting sat behind it, brass worn smooth where hands had checked the needle over the years. He had examined the fitting before. He had never taken off its plate.