The following publication contains information about Henry Moore Harrington:
Article: "War With the Sioux: Indian Fights and Fighters; Part II – The Last of Custer" by Cyrus Townsend Brady • Pearson's Magazine • September 1904.
Article: "Haunted by history: Tragedy followed Bighorn battle survivors" by Lorna Thackeray • Billings Gazette • June 21, 2009 • Pages E1 and E3.