Uncertain, unfair and bloodthirsty: “Many people still think of folk as a music with a very obvious agenda, i.e., political protest, singalongs for kids, etc. But “Rock-a-Bye Baby” has always been about a baby falling out of a tree — even if somewhere along the way a lot of people stopped listening to the words. Harry Smith never did.” – volume 4 of the Anthology Of American Folk Music is released – can it match the mystique of the first three, or is it just a bunch of songs?