Relief shown by hachures on state map. State map shows county boundaries; City map shows wards. City map covers Manhattan up to 18th Street on the west side and 32nd Street on the east side. "Entered according to Act of Congress in the year 1842 by Sidney E. Morse and Samuel Breese in the Clerks Office of the Southern District of New York." From: The cerographic atlas of the United States / by Sidney E. Morse and Samuel Breese. New York : Sidney E. Morse & Co., 1842-1845. Prime meridians on state map: Greenwich and Washington.