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.
Near view of bombproof tent in the advance line in front of Petersburg, Va., August 7, 1864 / from the Galleries of Alex. Gardner (…) Washington, D.C. ; Negative by T.H. O’Sullivan. Washington [D.C.] : Published and for sale by Philp Solomons ; New. 1864 (from title). The New York Public Library.