| Alexander Gardner [Attributed to] Copying Maps, Photographic Headquarters, Petersburg, Virginia 1865, March Albumen print, from glass negative, detail 19 x 24.6 cm (7 1/2 x 9 11/16 ins) Metropolitan Museum of Art Gilman Collection, Museum Purchase, 2005 Accession Number: 2005.100.1236 LL/53139
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