Some more details for this photograph of three soldiers can be found at the below link:-
Confederate Soldiers of the Third Georgia Infantry; two were half-brothers and killed in battle of Malvern Hill.
www.gettyimages.ca
The original caption for the complete photograph reads:
'Confederate Soldiers of the Third Georgia Infantry, two were half-brothers and killed in battle of Malvern Hill.'
Apparently, the photograph was created shortly before Malvern Hill.