Slightly reminiscent of artwork in an OOP Blandford book on the Peninsular War, I believe by Mike Chappel. I can't put my hand on my copy at the moment but I think the wounded guy was an artillery driver or somesuch.
It's a very nice piece, and I agree, it will get star treatment around the shows. I have to agree with you Roy, nobody does this sort of thing quite like Bill Horan.
Phil