For any of you Southern Blues fans this amazing set accumulated during the lifetime of Alan Lomax is a must.
Unique material and well recorded.
You can read about the story with a quick Google.
http://www.amazon.com/Sounds-South-Musical-Journey-Mississippi/dp/B000002IVR
http://www.youtube.com/watch?v=HMK5eQ_If5U&list=PLB67610B16024AFA2