Interesting angle, Steve. We tend to think of restoration in terms of stripping out later additions, but if you start from the assumption that the original must have had extra layers to it you could quite easily end up believing that your embroidery was really restoration. It reminds me of those C19 folklorists who would pronounce with great authority that the Boar's Head Carol portrayed a pagan ritual or that the Poor Old Horse was actually Odin's steed Sleipnir.

Here's the BOGW that I sing:

It's of a sea captain down by the banks of Yarrow
He courted his lovely Annie till she prov'd with child O;

"What shall I do, my love, what will become of me?
My mother and father they both will disown me."

"Go and fetch some of your father's gold and some of your mother's money,
And you shall sail the ocean along with your Johnny."

So she fetch'd some of her father's gold and some of her mother's money,
And she went on board a ship along with her Johnny.

They had not been a-salling scarce six weeks nor so many,
Before she wanted women's help but could not get any.

"Oh what is your women's help, my love, my honey?
Whatever a woman can do, it's I'll do it for thee."

"Oh hold your tongue, you foolish man, do not talk vainly
How little you know of what women have borne for thee!

"Then tie a napkin round my head, tie it soft and easy
And throw me right overboard, both me and my baby."

He's tied a handkerchief over her head, he's tied it soft and easy,
And he's thrown them both overboard, both she and her baby.

"See my love how she's swimming, see how her body tumbles,
See how she's rolling all on the water.

"My love shall have a coffin made of the gold that shines so yellow,
And the coffin shall be buried on the banks of Yarrow."