The following publication contains information about Bobtail Bull:
Article: "Startling Testimony of Custer's Scouts" by Laura Trowbridge • Young Hawk testified: "Forked Horn . . . saw that Bob-Tail-Bull was in trouble. He shouted, 'Let's dismount . . . make a stand.' Goose and I . . . each of us shot a Sioux right then. . . ." • Golden West • undated • Pages 30-31.