Gern,

I'm a Dylan fan and a Stanley fan. The duet that you refer to, The Lonesome River, is one of my favourite Stanley Brothers tunes. I have to admit, the duet took some getting used to, but it is now my favourite track on the 2 CD set. Apparently Ralph's wife felt the same way.

Dylan said that working with Dr. Ralph was one of the highlights of his career. The Stanleys were among Dylan's many influences. I have recordings of Bob covering "Somebody Touched Me" and "I Am The Man, Thomas".   

Another artist on that CD said that singing with Ralph Stanley is like painting with Picasso.

I have to admit, his work with his late brother Carter is still my favourite. The harmonies that those too had were angelic.