"Entered according to act of congress in the year 1850 by Thomas, Cowperthwait & Co. in the Clerks office of the District Court of the Eastern District of Pennsylvania"; Publication: Philadelphia : Thomas Cowperthwait & co.; Prime meridian: Washington; includes steamboat routes
A new map of Georgia, hmap1854n4, Hargrett Rare Book and Manuscript Library, The University of Georgia Libraries.