When I was a young fingerpicker my guitar playing pals and I spent many hours (years actually) trying to master the "stumbling" bass of Blind Blake that you hear on his tunes West Coast Blues, Righteous Blues, Too Tight etc. I managed a version of it but getting it up to Blake's speed was another matter. Ton Van Bergeyk, John Miller and Ry Cooder, among others, did a good job of it.