Elizabeth "Libba" Cotten (January 5, 1893 – June 29, 1987) was an American folk and blues musician. She was a self-taught left-handed guitarist who played a guitar strung for a right-handed player, but played it upside down.[4] This position meant that she would play the bass lines with her fingers and the melody with her thumb. Her signature alternating bass style has become known as "Cotten picking". ...