Chapter 41: Five Mass of Stone

The temporary closure was still intact when Mara read its seal number into the speaking plate.

Corven confirmed the witness wire had not shifted. The Examiner confirmed the old impressions matched the closing record. From E4, the Upper Witness reported the boxed key, restrained lever, housings, both lock bars, U-31-A, U-31-B, and every associated seal unchanged.

“Withdrawal remains available,” Tertia said. “Removal of the temporary closure does not authorize enlargement of the opening, rotation of the exposed mechanism, or contact with E4.”

No one withdrew.

Mara cut the temporary wire. Corven lifted the closure from the existing nine-by-four-finger opening without touching its margins. The five mass previously removed remained accounted for elsewhere: four mass of intact fragments in sealed salvage custody, one mass recorded as dust, contaminated chips, ceramic loss, and broken bedding. Nothing new left Tertia’s wall.

“Mara,” Tertia said, “report the cavity.”

“Old oil is visible at the lower saddle. A brighter film lies along the northbound sleeve. Grime has been displaced from its upper edge.” Mara paused. “Corven reports residual warmth at the probe tip. I confirm that he has not touched the braid or sleeve.”

The Examiner requested a wider view.

“No,” Tertia said.

“The mounting continues beyond the north edge.”

“Then use the mirror through the authorized opening.”

Mara did.

Her report came piece by piece: a braided bypass seated in a ceramic-lined chase; the already cracked guide; the recorded excess chisel scar from the prior excavation; a hinged routing saddle; and, north of it, a retained sleeve carrying a second brass plate.

“Read it.”

“Six-B, period, R, period, four,” Mara said. “6B.R.4.”

The first plate bearing the same designation remained fixed at the public Rack 4 chase. This second plate was not loose, displaced, or stored beside it. Corven reported that it occupied a keyed mounting on the northbound span, with one narrow tooth preventing reversal of the plate without removing the mounting.

“Two plates,” Tertia said. “Two physical positions.”

“Possibly duplicated labeling,” the Examiner said.

“Then duplication remains your hypothesis until loading distinguishes them.”

The mirror moved without touching the route. Mara reported three deliberate notches beside the retained sleeve, equally spaced along its permitted travel. There were exactly three. No fourth or fifth mark appeared under shifted lamplight.

Behind the sleeve sat an undocumented isolation pawl.

“Do not lift it,” Tertia said.

“I need its underside wear,” the Examiner replied.

“Lifting it destroys the seating evidence required to interpret that wear. Objection recorded. Pawl preserved in place.”

Further inspection found the sheave’s limit-pin witness wire cut flat and drawn aside. A waxed service thread lay recently tensioned against one guide. Corven identified old tool flats, two abandoned fastener scars, a newer clamp impression, and an altered mounting pattern. Mara reported a partial maker’s punch at the edge of the keyed mounting, too incomplete to identify a shop or office.

The Examiner reserved maker, installer, authority, and service history.

“Correctly,” Tertia said.

Mara opened the relevant legacy leaf outside the physical-evidence custody line and read the malformed entry through the plate. Its route mark had previously been treated as a copying defect: the Rack 4 designation turned back upon itself, followed by three short indexing strokes.

The Examiner compared the entry to Mara’s report of the keyed mounting, the sleeve’s bounded travel, and the three equally spaced notches.

“It is not malformed,” he said at last. “The reversed stem indicates the service face. The three strokes are indexed positions within the sleeve limit.”

“Historical reversal notation?” Mara asked.

“Yes. It records a reversible service configuration. It does not identify who operated it or why the second routed setting was omitted.”

The documents remained subordinate to the metal in Tertia’s wall. Ink could lie at leisure. The bypass was currently warm.

Corven began seating the steel bridge across the opening. Its feet rested only on intact margins, not on the damaged guide, temporary bedding, routing saddle, or either Rack 4 seal.

His right hand slipped as he set the northern foot.

“Hold,” he said immediately. “Old abrasion reopened.”

Mara halted all handling.

Corven withdrew before another person approached the cavity. Sera placed a clean shield between his hand and the opening. Mara inspected the margin and numbered cloth, then reported through the plate, “Blood remained outside the cavity. None contacted the route, bridge, tools within custody, salvage, or evidence surfaces.”

Corven accepted treatment and unsafe-loading halt authority passed to Sera for the remaining physical work.

“His tea is also outside custody,” Sera added.

“It has enough sugar to preserve itself,” Corven said.

“And salt,” Mara said.

Tertia considered this. “Does the cup require an independent seal?”

Mara’s quiet laugh reached the plate before she answered. “Not unless someone intends to drink it as evidence.”

The release lasted only a breath, but the room returned from it less brittle.