Guess what I found in me shed? Two 2 1/2" Provincials and a couple of 7th Series maps: the latter would, I guess, be the most helpful. Sheets 190 and 189 (of Cornish location); published 1961, so they'd be out-of copyright next year perhaps. They're in an alright condition: alright for from sixty years ago, and living in numerous lofts and sheds. If anyone's interested in scanning and rectifying them (I would but I wouldn't know where to begin) in time for the copyright-outing, I'll be happy to send them somewhere.