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.
Barometric profile of the route from San Antonio, via Castroville, Fort Inge, Howard's Spring, Ojo Escondido, Eagle Spring, El Paso del Norte, and Dona Aña, to the copper mines of Santa Rita, in New Mexico, in 1851. 1851 (from title). The New York Public Library.