Vanguard put out a great 2 LP set called The Bluesmen a long time ago that is priceless. It's got MJH (w/ Pat Sky) Son House (w/ Al Wilson), RGD, LH, JLH, Skip James all doing live stuff in the sixties (at Newport, I believe)as well as Muddy, Buddy Guy, Otis Rush and a bunch more. I don't know if it's on CD.

Also "Charley Patton, Founder of the Delta Blues" on Yazoo.

Frankie