The Cowden collection is a significant representation of family records and genealogy together with records of his work in developing the Sunday School work of the United Brethren Church. The materials regarding the Sunday School offer a window on the progress in developing the administrative and educational practices of the church. Cowden gave creative leadership in applying the Chautauqua format to the work of the Sunday School. The collection also includes Cowden's manuscript of his autobiography. It was published by the United Brethren Publishing House in 1915. Two items included are over-size and are packaged separately: a marked map of the Battle of Shiloh, and an architectural drawing of a tablet commemorating the life and work of Rev. John George Pfrimmerer, M.D., who established the first United Brethren Churches in Indiana and the first United Brethren Sunday School in 1820 on the site of this tablet.