Original: Native American Julia M. Butree (a wife of Ernest Thompson Seton) in her book, Julia M. Butree (Julia M. Seton) The Rhythm of the Redman: in Song, Dance and Decoration.
Simplified: Julia M. Butree in her book, Julia M. Butree (Julia M. Seton) The Rhythm of the Redman: in Song, Dance and Decoration.