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Martenet's map of Maryland : including the District of Columbia, a ske...
4743 U.S. Copyright Office Relief shown by hachures. Depths shown by soundings. "Entered according to Act of Congress in the year 1865 by Simon J. Martenet in the Clerk's Office of the District Court of Marylan... More
Union army's march on Gettysburg from Frederick, Md
Regional view shows paths taken by different segments of the Union army on a march from Frederick, Md., to Gettysburg, Pa., as well as the location of the Confederate army units in the vicinity. The Union troop... More