Behind the walls
Really you just never know what you will find behind the walls when you renovate. I once gave a client housewarming present of all the stuff we unearthed arranged in an apothecary case. It included milk bottles and prohibition bottles, dog tags and a communist manifesto.
This portrait, hung next to all their family photos, was found in the bowels of a building we affectionately call Lady Liberty, pictured below. They say since they hung the portrait there is no more creaking in the attic.