The heights of Christian devotion a study of the Lord's Prayer This book, "The heights of Christian devotion a study of the Lord's Prayer", by Doremus A. Hayes, is a replication of a book originally published before 1930. It has been restored by human beings, page by page, so that you may enjoy it in a form as close to the original as possible. This book was created using print-on-demand technology. Thank you for supporting classic literature.