I'm surprised that Son House hasn't been given a bigger wrap - one listen to "Death Letter Blues" was enough for me (also heard in [I presume] an earlier form in My Black Mama II). Also Skip James - and although it might be obvious, Robert Johnson - his version of "Preachin blues" is just outright amazing - also "Hellhound.." goes to show that he wasn't just a reworker of other popular pieces played in the region - a Skip James tuning maybe but definitely not a Skip James song!