I am led to believe from a reliable source that when Rounder was sold the field recordings remained with Bill Knowlin. Some of this material appears on the series the North American Traditions Collection a series being issued by the Field Recorders Collective. 16 albums all have massive, and I do mean massive notes, photographs and research freely available on their website. If you miss Rounder then Field Recorders Collective is the place for you. I have the first five discs so far.