Viele, Egbert L. (Egbert Ludovicus). "Plan for the improvement of the Central Park, adopted by the Commissioners, June 3rd, 1856." Map. New York: Ferd. Mayer & Co., [1856]. Norman B. Leventhal Map & Education Center, https://collections.leventhalmap.org/search/commonwealth:3f463279b (accessed April 19, 2024).