Object Lesson: Cereus Giganteus, Arizona by Timothy H. O’Sullivan
During the Civil War, Timothy O’Sullivan made a name for himself photographing army camp life and Eastern landscapes destroyed by cataclysmic battles. In 1871 O’Sullivan enlisted in the U.S. Corps of Engineers for a series of expeditions to map the lands west of the 100th meridian, commonly referred to as the Wheeler Survey (after leader… Read More