A cousin recently turned up a family carte-de-visite album among her mother's things. I knew about the little photographic calling cards that people used to collect and exchange. They were invented—and patented—by a Paris photographer, Andre Adolphe Eugene Disdéri, and I had looked at individual examples of famous people when I was researching Where the Light Falls. What I didn't know was that soon after Disdéri's invention, someone invented albums with framed pockets into which you could slip your collection and keep adding. Old albums with annotations, like those in the Sturgis-Codman album, would be a wonderful resource for seeing the relations among friends and family or the interests of a collector. Historical fiction writers and family historians, happy hunting!