Finch knelt at the base of the glowing kiosk and unclipped their newest petition from the satchel. They smoothed it flat against the lit panel and pressed the pin home. Beside it, already waiting, hung a corroded copper sheet with the word WARNING burned across its face. Finch's jaw tightened. They wanted a name. They wanted proof. They pulled the warning sheet down and held it next to the others stacked in their folder. The letters were burned, not written. No handwriting. No ink. No phrasing to match against the rest. Every threat in the pile looked the same blunt way. Finch turned toward the crystal cabinet beside the kiosk, where official records pulsed behind glass. They could file a complaint, but a complaint needed a suspect, and a suspect needed evidence the panels would accept. A small larva wriggled out from under the bottom edge of the warning sheet. Its antennae twitched. It had been burrowing in the soft metal. Finch caught it gently in their palm and turned it over. Faint tracks ran across the copper where the creature had chewed — and beneath the burned letters, the tracks formed shapes. Loops. Curves. A signature pressed into the back by whoever had held the sheet down to brand it. Finch held the sheet up to the kiosk's light. The hidden marks glowed through. Not the same on every notice — they would differ, person to person, hand to hand. A comparable mark. At last, something to match. Finch tucked the larva into a small jar and the warning sheet into their folder. The cabinet hummed behind them. They had a method now. They also had a problem: someone, somewhere, was about to notice their notices were missing.

Finch left the kiosk with the warning sheet pressed flat inside their folder. The cabinet hummed behind them, but its glass doors were public. Anyone could peer in. They needed walls, not windows. They needed a door that locked. They crossed the field to a squat concrete structure set into the rock. A reinforced metal door waited, scarred and heavy. Finch worked the latch and slipped inside. The air smelled of stone and old copper. This would be the place. Private. Sealed. Inside, Finch unrolled a translucent sheet across the warning notice. They smoothed it down. The adhesive caught the raised tracks beneath the burned letters. When Finch peeled the sheet back, the hidden signature came with it — every loop, every curve, lifted clean. They pinned the transfer to the inside wall. Then they dragged in a large, weathered billboard frame from the back chamber and bolted the copper sheet to its panels. One signature mounted. Room for many more. Finch stepped back. The vault held the evidence now. No glass. No public eyes. They could compare every signature here, side by side, as the pile grew. They locked the door behind them. The folder felt lighter. The arc of the work felt longer. Somewhere out there, a hand that had branded those sheets was still moving — and Finch finally had a place to catch it.

Finch returned to the kiosk at dawn. A new notice glowed there, jagged-edged and bright. It listed their vault by name. The threat was clear. Move the evidence, or watch it burn. Finch read it twice. Their hands stayed steady. They walked back to the vault and unlocked the door. The copper sheet still hung on its frame. The transferred signature still clung to the wall. Both had hours, maybe less. They dragged in a heavy steel crate from the back chamber. Reinforced bands. Tight seams. Finch lifted the warning sheet off its frame and laid it flat inside. The lifted signature went in next, pressed between clean panels. Finch pulled out a glowing wax seal stamped with strange script. They pressed it across the lid. The mark cooled hard. Now the contents were logged, dated, official. Tampering would leave proof. They shoved the crate behind a false panel in the rear wall and set the panel back in place. The vault looked empty. The evidence was hidden inside its own hiding place. Finch locked the door and stepped out into the cold air. The threat had failed. But whoever wrote it knew where the vault was. They were watching. And now they knew Finch had moved first.