It comes from a geography book, possibly one by S. G. Goodrich. The engraver Boynton flourished c1850 and did work for Goodrich, Tanner, and other publishers of the time per Lister. The verso is page 286 with 1850 census data and the map can be dated 1850-55 by counties shown. A few rail lines and canals appear. The first locomotive chugged from Philadelphia all the way to Pittsburgh about this time.
Longitude is from Washington.
Size 5.5 x 9 inches. Cedar St., New York 1854. This map is on vellum paper and folds into a 5 x 3.5 inch black cover to which it is attached. On the inside of the cover is a Colton ad with a list of maps published. Like the Mitchells, two or three generations of Coltons were involved in map publishing.