I find it very interesting that an actual name is not given for the lady from Roxburghshire. But since Sir Walter's Douglas Tragedy caused such a lucrative sensation in that area, I do think that my theory of why the motif would be excluded on a version from that vicinity holds true. The people around Roxburgh and Selkirk, the supposed site of the Douglas Tragedy, felt it belonged on their ballad.

The Percy Papers and Kinloch's manuscripts were both auctioned off to Harvard in 1884. That means that 75A and 75B never reached print until about that time. They were first published by Child. That's important if you're trying to see where printed texts may have influenced subsequent versions.