16 x 20" steel engraved map with original hand water color . Fine condition on this stylized mid century map with elaborate border designs and handsome coloring. Important maker and publication by J. Baker Cowperthwaite , printed and collated by S. Augustus Mitchell and Charles DeSilver and famed for its well respected maps of the United States for 1850 , vetted through 3 of the best printers, publishers and cartographers of the time. Includes Canals and Railroad mileage charts and vendors . Fine condition without flaw.