I first learned 'Rising of the Moon' to the first tune given, as a child - considerably before PPM were around. I have no idea of the origin of my tune except that was the way it was sung in our family. Since various ancestors had emigrated from England, Scotland and Ireland, I always assumed that it was the traditional tune in those countries (or at least one of them). I was surprised when I heard it to 'Wearing of the Green' in my twenties.