Susan....wondering if you or anyone else is familiar with the name Marie Rhines?? She was/is a classically trained violinist who "crossed over" to Bluegrass/Folk...in the late seventies (maybe). She was living on Cape Cod back then, and had a similar passion for tracing and performing the history of the music. I believe she would be VERY interested in your husband's project and would have LOTS of information and expertise to share.