Can you name prior sources for any of those? Some are variant Revival arrangements of a single example from tradition, while the Dransfield text is their own anglicization of the usual folk club form. Several have been posted in other discussions of the song group, some of which have helpful information not in this old, recently-revived thread.

Presumably some of those records had useful sleeve notes that you could quote? If they are to be useful for purposes of comparison, that additional information would be needed.

I'd better just mention, since this discussion has been brought back from the dead, that the example posted back in 1999 by Celtic Harper is the Thomas Ravenscroft There were Three Ravens (Melismata, 1611), with "three ravens" altered to "twa corbies" for some reason.