U.S., 1898 Department of the Interior Bureau of Pensions, (Official Business) Penalty for Private Use cover, sent from Washington, D.C. to Madisonburg, Ohio.  There is a letter enclosed, signed by U.S. Congressman John A. McDowell of Ohio, on House of Representatives stationery (about a pension for his constituent). Please see photos for postal markings, contents, and exact condition.  Scarce.  
Free 1st class shipping to any U.S. address.