Big Walter Horton & Jimmy DeBerry, “Twice as Easy/Need My Baby.” Recorded August 29, 1972 in Memphis, Tennessee. Some of the rawest blues you’ll ever hear—check out that harmonica. Released on the Crosscut Records compilation Back – The Complete 1972/1973 Memphis Sessions, Vol. 2. Like Vol. 1, it’s long out of print, never released on CD. Much more information here.