Washington D.C. Capitol Floor 1846-9 Mitchell Burroughs City Plan MapCity of Washington. (Old Maps, 19th Century Maps, United States, District of Columbia, Potomac River, Capitol Building, Pennsylvania Ave, Mason's Island). Issued 1846 9, Philadelphia by S. A. Mitchell & H. N. Burroughs. Attractive and uncommon mid 19th century lithographed map with original hand color. Not to be confused with the much more common later version of this plan by Mitchell which are entirely different with different coloration, etc.