For this weeks #DeltaBluesMonday I've looked at the into to 'From Four Until Late' by Robert Johnson. It was made famous by Eric Clapton and is a great example of Robert Johnson playing around with the blues. The harmonic movement from C7 - F/A - Fm/Ab - G7 is very reminiscent of rag time guitarists like Blind Blake, Big Bill Broonzy or Lonnie Johnson. Make sure you listen to the original to get an idea of the swing and groove in the the 4th measure.