License, verbatimUS-PD
The New York Public Library states no known U.S. copyright for this item. Pinax admits it as US-PD only because the work predates 1900, making public domain near-certain worldwide; status outside the U.S. is not asserted and reuse elsewhere is the user's responsibility. Credit: From The New York Public Library.
Map of Drainage System on Lower Part of the Central Park as far as completed up to December 31st, 1858. 1858 (from title). The New York Public Library.