The complete photo is at the Library of Congress Online, and is part of their Civil War Photograph collection.
TITLE/LABEL The Peninsula, Va. A 12-pdr. howitzer gun captured by Butterfield's Brigade near Hanover Court House, May 27, 1862
PHOTOGRAPHER not specified.
CREATED/PUBLISHED 1862.
MEDIUM 2 negatives (3 plates) : glass, stereograph, wet collodion.
REPOSITORY Library of Congress Prints and Photographs Division Washington, D.C. 20540 USA
CALL NUMBER LC-B811- 2354
REPRODUCTION NUMBER LC-DIG-cwpb-01571 DLC (b&w copy scan of left half)
LC-DIG-cwpb-01570 DLC (b&w copy scan of right half)
LC-DIG-cwpb-01572 DLC (b&w copy scan of variant)
LC-B8171-2354 DLC (b&w film copy neg.)
COLLECTION Selected Civil War photographs, 1861-1865 (Library of Congress)
DIGITAL ID (b&w copy scan of left half) cwpb 01571 http://hdl.loc.gov/loc.pnp/cwpb.01571
(b&w copy scan of right half) cwpb 01570 http://hdl.loc.gov/loc.pnp/cwpb.01570
(b&w copy scan of variant) cwpb 01572 http://hdl.loc.gov/loc.pnp/cwpb.01572
(intermediary roll film) cwp 4a39681
NOTES Civil War photographs, 1861-1865 compiled by Hirst D. Milhollen and Donald H. Mugridge, Washington, D.C. Library of Congress, 1977. No. 0145.
Photograph from the main eastern theater of war, the Peninsular Campaign, May-August 1862. Photograph of a gun captured by 12th Maine and 17th New York Infantry.1862.