Papers of Father Peter J. Powell, Episcopal priest in charge of St. Augustine's Indian Center in Chicago since 1961, Cheyenne scholar, and longtime Newberry Library fellow. Papers include his correspondence from the 1950s-2000s, personal correspondence, friends correspondence, Crow correspondence, and Lakota and Pawnee correspondence. Also includes files of persons related to his research and writing, Cheyenne distribution files, and files concerning his works including People of the Sacred Mountain, Sweet Medicine, and In Sun's Likeness and Power.