Apparently this is a ballad about the battle of Bosworth and the wars of the roses. That's the sum and total of what I know cos all I have is a reference in a history book, but it sounded like an interesting thing.The book references it to someone called "Pollard" - which might help, I don't know.
If anyone has the words, that would be handy, access to a tune would also be good.
I live in hope.......