James F. Gibson 1862, May (taken, later print) Union fortifications, Yorktown, Va. [The War for the Union. Photographic War History, 1861-1865.]
Stereoview Library of Congress, Prints and Photographs Division Reproduction Number: LC-DIG-stereo-1s02546 (digital file from original stereograph, front) LC-DIG-stereo-2s02546 (digital file from original stereograph, back)
Stereograph shows Union soldiers mounting 13 inch mortars in Federal Battery No. 4 along the line in Yorktown, Virginia.
