Long title:A New Map of the State of Ohio. Published 1855 in Pennsylvania, dated 1850 . Lithograph with original full wash hand colouring; hand coloured by county. Overall sheet size: 34.8cms x 42.8cms; image size: 332mm x 405mm. Characteristic green decorative border and pastel colouring. Profile of the Ohio and Erie Canal below map together with Profile of the Miami Canal. Thread margins on left hand side and browning to borders; one repaired edge tear not into image right border else good.
Thomas, Cowperthwait & Co. were a publishing company based in Philadelphia. They were part of the burgeoning atlas and map publishing in the early to mid-nineteenth century. They published many famous works, including Tanner’s New Universal Atlas. Their maps are notable for the decorative borders and fine, vivid original hand colouring.