David Rumsey
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Frederick County Maryland
3840.000
pilot
Frederick County Maryland Prepared under the direction of Lieut. Col. J.N. Macomb Chf. Topl Engr for the use of Maj. Gen. G.B. McClellan Commanding U.S. Army 1861.
1861
Hergesheimer, Edwin
U.S. Coast Survey
42 × 46 cm
1 : 125000