DmG

The version in DT is, I think, from one of the "poetic" versions rather than from tradition (for which I ca only apologies) but there are other versions. As for Scott's "Twa Corbies", Hodgart (1950), for example, says

"Scott said that it had been communicated by C. Sharpe, as written down from tradition "by a lady", but it is poorly supported in folk tradition. For this reason, and from internal evidence, it is likely that the version is largely of Scott's making. It has become a narrative of domestic tragedy, with the story partly concealed ... instead of a rich symbolism, it has only brilliant pictorial imagery: almost everything is on the surface"

Yes, Scott was a good poet.

Cheers!
Ian