I think Delia Murphy used to sing a version with the verse:

*His* parents they slight me, and will not agree
That I and my sailor boy married shall be,
But let them deride me, and do what they will,
While there's breath in my body, he's the one I love still.

(and I think in her version the first verse - If I were a blackbird I'd whistle and sing... - is repeated at the end. But I don't remember any of that fancy scholar stuff.)