As I was working, this piece of insulation fell out. On the other side of the wall is a built-in shelf, and I had never put any interior covering over the insulation. Seeing how little there is before the interior isn't interior any more, I felt a twinge kinship with the feet of Ozymandias. I know life cycles things around that way, but I'm hoping to keep resisting for a while yet. The solid sound I get when I rap on the new wood with my knuckles is very comforting.