Long before Ry Cooder, Leo Kottke, Richard Thompson, and others were impressing listeners with their ability to hop from genre to genre, Sandy Bull glided from classical and jazz to ethnic music and rock & roll with grace and verve. Accompanied on his first two albums by renowned jazz drummer Billy Higgins, Bull produced some of the first extended instrumental compositions for guitar that incorporated elements of folk, jazz, and Indian and Arabic-influenced dronish modes. Not "rock" by any stretch of the imagination, it's nevertheless easy to see that it could have had an infl...