At the time of the tour, Dylan had already recorded an album, half electric and half acoustic, called Bringing It All Back Home, and had released a rock and roll single called "Subterranean Homesick Blues" which pointed his work in a whole new direction.

NPR: Dylan, the Red Dog and the Real Summer of Love

Slim cut his first single, Scufflin, in 1966 and became a Chicago blues fixture in his own right, developing a guitar style that blended a distinct vibrato with a slide-guitar-like sound formed with his bare fingers against the strings.

BBC: Magic Slim, American blues musician, dies aged 75