A commenter below asked who Robert Johnson was (he died on this date in 1938).
According to the Rock and Roll Hall of Fame:
Robert Johnson stands at the crossroads of American music, much as a popular folk legend has it he once stood at Mississippi crossroads and sold his soul to the devil in exchange for guitar-playing prowess. He became the first modern bluesman, linking the country blues of the Mississippi Delta with the city blues of the post-World War II era. Johnson was a songwriter of searing depth and a guitar player with a commanding ability that inspired no less an admirer than Keith Richard of the Rolling Stones to exclaim, “When I first heard [him], I was hearing two guitars, and it took me a long time to realize he was actually doing it all by himself.
According to Eric Clapton, “Robert Johnson to me is the most important blues musician who ever lived….I have never found anything more deeply soulful than Robert Johnson. His music remains the most powerful cry that I think you can find in the human voice.”