Song Studies collect the different versions of a song in the Baring-Gould manuscripts into one document so that the differences between them can be seen more easily. I have produced a few of these for different people at different times but I am still working towards a standard format. More will appear here in the next few months but here, as an example, is the first of these studies

The Undutiful Daughter (a variant of 'The Banks of Green Willow')