Susan Richards, a member of the Philadelphia Dumpster Divers, has work in their show LOST AND FOUND at West Chester University.  Her piece "A Case of Parricide in the 19th Century" is part of her series based on salvaged library card catalogue cards.  Like most of the materials used by the Dumpster Divers, these cards, artifacts of a bygone era, would literally be trashed if not upcycled into art.