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- —. Letter to Charles E. Smith, Philadelphia, PA. May 16, 1864. National Archives.
- —. Letter to Charles E. Smith, Philadelphia, PA. May 27, 1864. National Archives.
- —. Letter to C.S. Horners, Boston, MA. August 15, 1861. National Archives
- —. Letter to Edward Bates, Attorney General. November 19, 1862.
- —. Letter to Colonel E.D. Towsend, Assistant Adjunct General. September 3, 1862. National Archives.
- —. Letter to E.M. Stanton, Secretary of War. August 9. 1862. National Archives.
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A Postal Revolution and a Political Upheaval