Keith F. Davis is curator of photography at the Nelson-Atkins Museum of Art. He is the author of An American Century of Photography: From Dry-Plate to Digital, The Hallmark Photographic Collection (1999) along with The Art of Frederick Sommer: Photography, Drawing, Collage (2005) and The Origins of American Photography: From Daguerreotype to Dry-Plate, 1839–1885: The Hallmark Photographic Collection at The Nelson-Atkins Museum of Art (2007), both published by Yale.