John Lee Hooker [as Down Child for Modern]
Yardbirds [with Eric Clapton, supporting Sonny Boy on tour in London]
Robert Jr. Lockwood [credits Robert Johnson (see footnote)]
Ronnie Earl & The Broadcasters [vocal: Robert Jr. Lockwood]
Lockwood credits his mother's lover Robert Johnson. Claims this was one of the first songs his mentor learned him to play. And so Lockwood is the obvious go-between for Sonny Boy Williamson. Both Sonny Boy and Robert Jr. were live entertainers on the famous blues radio show King Biscuit Flower Hour, (still) broadcasted dayly from Helena, AR.