Tanya Sheehan is Director of Research at the Lunder Institute for American Art, and William R. Kenan Jr. Professor of Art at Colby College. She is the author of Doctored: The Medicine of Photography in Nineteenth-Century America (2011) and Study in Black and White: Photography, Race, Humor (2018). Her edited books include Photography, History, Difference (2014), Photography and Its Origins (2015, with Andres Zervigon), Grove Art Guide to Photography (2017), and Photography and Migration (2018). Her current book project examines modernist art by African Americans that explores black agency through the subjects of medicine and public health. Since 2015 she has served as executive editor of the Smithsonian Institution’s Archives of American Art Journal.