Context

Context of Washington County, Maryland, compiled under the direction of Lieut. Col. J.N. Macomb Chf. Topl Engr for the use of Maj. Gen. Geo. B. McClellan, Commanding Army of Potomac, 1861 ; drawn from Thomas Taggart's map by E. Hergesheimer, photographs by G. Mathiot & D. Hinkle by permission of Prof. Bache Supt U.S. Coast Survey
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