Very nice looking rifle Scott. I see a lot of French influence there, as well as some flavour of the Norhthampton School...butt shape, "V" forend, fleur-de-lis, colour. Though the butt plate is not of the "sheath" style, it does not detract at all from the rifle's architecture. I've handled lots of Lehigh rifles that didn't have that inlet return. I personally would have used a different side plate though, but that's just me.
Very cool rifle.