Gamble, William H.(W 97°--W 89°/N 44°--N 36°). Prime meridians: Greenwich and Washington. "Entered according to Act of Congress in the year 1860 by S. Augustus Mitchell Jr. in the Clerks Office of the District Court for the Eastern District of Pennsylvania." Ornamental border. Individual peaks shown by hachures. Shows railroads. Detached from Mitchell's new general atlas (pl. 36).33 x 26 centimetersJPEGUMN_ALMA:9927568660001701engS. Augustus Mitchell (Philadelphia)PublicCounty map of the states of Iowa and MissouriMapsUnited States1860University of Minnesota