In 1850 seven South Carolina slaves were photographed at the request of the famous naturalist Louis Agassiz to provide evidence of the supposed biological inferiority of Africans. Lost for many years, the photographs were rediscovered in the attic of Harvard's Peabody Museum in 1976. In the first narrative history of these images, Molly Rogers tells the story of the photographs, the people they depict, and the men who made and used them. Weaving...