When revival performers have collated tunes and texts, they've usually got their raw material from sources like Bronson (or his sources), even when they haven't been specific about it; the potential value of this sort of thing is in making that source material more widely available in something like an "authentic" form, I'd say.

I'm at about the same stage as Ivan, having copied volume 1 and part of the addenda; when the students are away for their holidays I'll be back in the library slaving over a hot photocopier again.