Union Surgeons Seymour Churchill and William A. Madell of the 23rd New York Volunteer Infantry Regiment Posing in Front of a Tent During the Civil War

Union surgeons Seymour Churchill and William A. Madell of the 23rd New York Volunteer Infantry Regiment posing in front of a tent in an unidentified camp during the Civil War. Attributed to Mathew Brady. Animated stereoscopic photographs.

Source.
More information.