It's about the Wars of t'Roses, so (I'm no historian) could be Edward IV? Richard III?
Who says that the King and I at discords be
Discerning parties close inspection no such mood can see
Indeed Lord soul unhappy now it seems
The ocean's grey and the King ordained and I was caught between ...
He says that he'll come up and see to me sometime
All across the borders boundaries scattered and defied
And on my picture left in Scotland swore me sanctuary denied
To hunt me all across the border
And from Alnwick to the Tyne