For the record, in the medieval church, being buried inside the church was common and the walls of the choir' (choire - where the clergy sat) was often a favoured spot for burying the clergy and patrons, which suggests not only that the ballad (or the motif) was older than sometimes believed bt also a class difference between the protagonists - one buried in state, the other stuck out in the cold
Tom Lenihan, who sang this ballad, always said that the burial bit, particularly the 'rose and briar' didn't belong to this ballad
Jim Carroll