What interested me about Chuck Berry was the way he could step out of the rhythm part with such ease, throwing in a nice, simple riff, and then drop straight into the feel of it again. We used to play a lot more rhythm stuff. We'd do away with the differences between lead and rhythm guitar. You can't go into a shop and ask for a "lead guitar". You're a guitar player, and you play a guitar.

Denyer, Ralph (2002). The Guitar Handbook. Alfred A. Knopf. ISBN 0-679-74275-1..