Even with the word Gaol, these feel American to me. I found the other cards from their eBay listing. I feel like the English is American. It's not hard to find American copy and vocabulary like this on old postcards and in old advertisements. The campaign hats feel American. (I've just found, though, that some British troops (after seeing North American hats) wore them around or after 1890; see Wikipedia - Campaign Hat). I didn't find these, nor any similar, in Hochman either.
These are really, really nice! I shall defer, hopefully, to posts below.