I just have a brief note about the so-called "Aunt Mary Moses" problem. I think Shirley Collins caused this when she recorded it on "No Roses"(?). It's just a rather old mis-hearing (mondegreen) of:

"God Bless Saint Mary, Moses and all their Power and Might O!"

There are versions around (I don't know where at the moment) with the correct text in.

Cheers!
Ian