and he replied thus:
"I was asked where Brian Mullen, who was Clannad's source for "The two Sisters" and whether there was any possibility that the tune had been Clannad's own.
Brian tells me he got the song from Clive Collins, English Fiddler, whose source he believes was Andy Irvine who learned it in America..
(Conjecture) - Andy changes tunes.).
Oddly, I'll be seeing Clive on Monday and will ask - I can then go to Andy and see what's what..
Keep me at it..