I'd personally hope we could find a genealogy to prove this. :-) But if we accept it, it gives rise to a lot of questions. Just having a great informant as an ancestor doesn't always result in having great songs -- Derek Piotr talked to the grandchildren of Pearl Jacobs Borusky, who was a very important American informant, and they heard her sing but what they remembered was pretty zersungen.

But the thing that I would really be interested in would be the songs that Anna Gordon herself remade. Did those get transmitted more or less than the others, and was there any change in their texts? These would be cases where there probably wouldn't be a print reference available. How does that affect transmission?

Our knowledge of oral transmission is sorely limited because we so rarely have collected versions from both a source and the source's source. So this would be a case that gives us some genuinely useful information.