Philadelphia: Thomas, Cowperthwait & Co. 1850. unbound. Map. Engraving with original hand coloring. Image measures 12.25" x 15" very good.
Thomas, Cowperthwait & Co. took over publication of S. A. Mitchell's important "Universal Atlas" in 1850, and continued to produce updated maps that were considered some of the best commercial cartography of the 19th century.