Stanley Vestal is the pen name of Walter S. Campbell, who up grew up in Southern Cheyenne country. A graduate of Oxford University and longtime Professor of English at the University of Oklahoma, he wrote many distinguished books on American Indians and the West, including Sitting Bull, Champion of the Sioux.
Father Peter J. Powell was founder and first director of St. Augustine's Center for American Indians, Chicago. He is also the author of the two-volume People of the Sacred Mountain. He is an Honorary Chief of the Northern Cheyenne People. Since 1972 he has been a Research Associate of The D'Arcy McNickle Center for American Indian History, The Newberry Library, Chicago.