Relief shown by hachures. "Entered according to Act of Congress, in the year 1860 by S. Augustus Mitchell, Jr. in the Clerks Office of the District Court of the U.S. for the Eastern District of Pennsylvania." From Mitchell's new general atlas. Philadelphia: S. Augustus Mitchell, Jr., 1865. Prime meridians: Washington and Greenwich. "44." Dimensions: 23 x 30 centimeters
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