I see an emblem on his brass buttons, but can't tell what it is. It was common for buttons to bear the logo of the state from which the soldier's regiment came.
Other standard issue buttons merely had an A, I or C on each. A for artillery, I for Infantry, C for cavalry. Still other buttons merely had CSA imprinted thereon. Some buttons were made of pewter instead of brass.
Most of the soldiers in these pics look decidedly humorless and serious. This was mostly due to the fact that they had to sit or stand perfectly still for about a minute while the camera took their picture. Wet plate photography was not instantaneous. The photographer took a cap off the camera lens, and replaced it a minute or so later. Any movement would produce a blurry picture.
