Matt,
Certainly in the paper I mention above Sigrid didn't cover it there.
Seems to me if someone can place the historical facts for what Joe has said this will add enormously to what we know about the ballad.

Has anyone verified that LC's Lilt is the same tune to the ballad as recorded from oral tradition? There must have been lots of Lady Cs. Unless someone has verified they are the same or even similar there is no real reason to connect the two.