I was comparing some versions of these tunes, and a puzzling one is Riddell's Drunken Wives of Carlisle, which is very close to the Northumbrian 'I saw my Love' versions, from Dixon to Clough, but with 9 notes, from G to a, and in G major, so without the low subtonic. The Sinkler version of Drunken Wives is (a fiddle version of) a BP tune, very mixolydian, really using the low subtonic.
Dixon's I saw my Love is in G mix, but clearly a precursor of Peacock's and all that came after.
What was Riddell's version played on? If it was for smallpipes it would have 8 notes - Riddell was at a time and place where keyed small pipes were a distant rumour. If it was for fiddle it would likely have strayed beyond the 9 note compass, which it holds to very strictly. The top a's are important in this version.
It looks like it's workable on BP - you'd need to cross-finger the c naturals, and ideally bring the drones down to G. Or else there were dorian mode chanters around?
John