How does Luther Standing Bear’s description of the Carlisle School compare to Ellis Childers’s description?

The story of the Carlisle Indian Industrial School begins with a brief introduction to its founder. Richard Henry Pratt spent eight years (1867-1875) in Indian Territory as an officer of the 10th Cavalry, commanding a unit of African-American "Buffalo Soldiers" and Indian Scouts. During this time, he was stationed at Ft. Sill, OK, 60 miles east of the site of the Battle of the Whitewash where Black Kettle (Cheyenne) was eliminated  1867.