Diddley bow player Lonnie Pitchford was an obscure Delta blues player until he was "discovered" by ethnomusicologist Worth Long. He began to attract crowds playing the music of Robert Johnson, songs like "Come On In My Kitchen" and "Terraplane Blues," on his one-stringed didley bow. Pitchford began playing Johnson's tunes after meeting guitarist Robert Jr. Lockwood at the World's Fair in Knoxville, Tennessee. Lockwood showed Pitchford some basic Johnson chord changes and arrangements, and for several years after that, Pitchford was accompanied by the late Alabama bluesman John...