Harrison, John F., Cartographer, et al. Map of the city of New-York: extending northward to Fiftieth St. [N.Y. New York: Publ’d by M. Dripps, . Phil’a Philadelphia: Engraved and printed at Kollner’s Lithographic Establishment, 1852] Map. Retrieved from the Library of Congress, http://www.loc.gov/item/2017586293/