Zimmer, Donald. “The Diary of Calvin Fletcher. Volume V, 1853–1856: Including Letters to and from Calvin Fletcher by Gayle Thornbrough, Dorothy L. Riker, And Paula Corpuz”. Indiana Magazine of History (March 1, 1978). Accessed May 26, 2020. https://scholarworks.iu.edu/journals/index.php/imh/article/view/10072.