Map Map of the routes examined and surveyed for the Winchester and Potomac Rail Road, State of Virginia, under the direction of Capt. J. D. Graham, U.S. Top. Eng., 1831 and 1832; surveyed by Lts. A. D. Mackay and E. French, 1st Arty., assistants in 1831, and Lts. E. French and J. F. Izard, assistants in 1832; drawn from the original plot by Lt. Humphreys, 2d Artillery.

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