which artist appeared on Nanci Griffith's third album ?
Once in a Very Blue Moon:  Noted country musicians performing on the album include banjo player Béla Fleck and champion fiddle player Mark O'Connor. Mark O'Connor: Mark O'Connor (born August 5, 1961, Seattle) is an American bluegrass, jazz and country violinist, fiddler, composer and music teacher.
Mark O'Connor