The Adventures of Piang the Moro Jungle Boy: A Book for Young and Old (1917)

According to Wikipedia: "Nicholas Vachel Lindsay (November 10, 1879 - December 5, 1931) was an American poet. He is considered the father of modern singing poetry, as he referred to it, in which verses are meant to be sung or chanted. His numerous correspondences with the poet Yeats detail his intentions to revive the musical qualities in poetry as had been practiced by the ancient Greeks. Because of his use of American Midwest themes he also became known as the "Prairie Troubador."