ROBERT JOHNSON (1911–1938), who ranks among the most influential and innovative American guitarists, played the Mississippi delta blues and was a major influence on early rock and rollers, especially the Rolling Stones and Eric Clapton. His intense slide-guitar and finger-style playing also inspired generations of blues artists, including Muddy Waters, Howlin’ Wolf, Bonnie Raitt, and Stevie Ray Vaughan. To get a sense of his style, visit The Robert Johnson Notebooks, http://xroads.virginia.edu/~MUSIC/rjhome.html.