On a side note....I believe the only way to really know the origins of completed guns, un-finished actions and barrels and who the "house engraver was is to have access to the cash books. The books used by gunmakers to record who they paid for services, parts and equipment. I don't believe the Lancaster cash books survived time. The existing records really don't provide that much info. The records for Lancaster guns are owned by the rifle maker Ronald Wharton formerly of Rigbys (UK).