'The traditional source is the whole of the case, anything else is just a gloss, fun though it may be.'
Actually, I don't think it is. Why did the folk scene utterly reject Mary and John Taylor, traditional inheritors of their father's singing and repertoire? Joseph Taylor was either a tradition carrier in which case his children's singing was as valid as his own, or he was an individual stylist whose delivery, it seems, was far more important than the songs he was transmitting to his children. The reason, Mary said, was because they sounded, "too churchy". Hmm… the classical singing tradition v the 'traditional singing tradition?