These 2 period photos, the left photo is from the famous camp dining photo, of a NY engineers unit in bealeton va, the right photo is just a random photo I stumbled across,,but to me, they seem like they could be the same soldier,,one photo taken a bit earlier. The guys nose looks like an exact match, his mustache, the tip of his cap. He just looks a bit heavier in one, and a bit more gaunt in the other. I can't be certain, but to me, I think it's the same soldier, and I'd imagine a few years of cw can sink a man's cheeks in.