Deep into the psychedelic age, poster artist Lee Conklin took the notion of visual hallucination to a whole new level with his twisted, writhing images of figures, faces, and hands morphing into… what is that thing, anyway? This concert poster for the Yardbirds is especially notable, as it promotes one of the last appearances by the famed group before Jimmy Page led them into the New Yardbirds, who then, of course, became Led Zeppelin.