Mmmm,

He does give 3 pages of references but the book does seem to have a lot of stated information with out references presumably simply based on Lloyd's memory?

I love this:

Lady Isabel and the Elf Knight, 'Of all ballads' says Child, 'this has perhaps obtained the widest circulation.'

Which Lloyd follows with;
At least 150 variants of it have been collected in the English spaeking-world, and its relatives are well known from Portugal to Poland, from Scandinavia to the Balkans. More than 250 versions are reported from Germany, 80 from Poland, 60 odd from Franceand French Canada, about 50 from Hungary.

Can anybody know of this is true?

Lloyd certainly paints a conclusive picture of pan-european songs - how true is this picture?