Inspired by the sound of the digger he worked on by day. Eddie was a globetrotter of the blues: born in Stovall, MS; via Memphis in the '30s to Chicago in the '40s & '50s; moved to London in the '60s, later to Paris and in '71 to Helsinki, Finland. See also: Blue Coat Man.
Yardbirds [with Eric Clapton]
Cuby & The Blizzards [later they had a full session with Eddie Boyd]
Yvonne Hunter [as Have You Ever Been Mistreated in John Cohen's film documentary Musical Holdouts]
Ike Turner [as 18 Long Years]
J.O.B., just like Cobra, was a leftover blues label in Chicago, ending up with the stuff Chess turned down.