I first knew 'Sally Gardens' from The Bishop of Welling's recitals at Farningham and considered it one of his best. This thread sent me off to Peter Pears' version on youtube. Ok one might want to argue that the poetry of a Victorian Irish playwright doesn't qualify as 'folk music' but I think there's just as much feeling in the Britten/Pears' version as there was in the Bishop's and just as much tradition.