Syd Barrett, late 1967.
"He seemed to be on acid every day.  We heard he was getting it in his tea every morning."
(Nick Mason's Archive)

Barrett and Waters en route to Denmark in September 1967, when the former was declining fast. "Syd's mother blamed me entirely for his illness," says Waters.   (Nick Mason's Archive)

David Gilmour joins the sort-lived five-piece Floyd, January 1968. Left to right: Syd Barrett, David Gilmour, Rick Wright, Nick Mason, and Roger Waters (front)
(Nick Mason's Archive)

Waters bangs the gong in Brighton, where Dark Side's premiere was cut short by malfunctioning backup tapes.
(Jill Furmanovsky)

Waters plays the bass part of "Brain Damage/Eclipse." "that song is saying 'There you are, that's all there is to it: What you experience is what life is like.'"
(Taken from the DVD Live at Pompeii: The Director's Cut)

David Gilmour, pictured while attempting final aobrtive overdubs on "brain Damage." "After an amazing guitar solo, Roger would say something like, 'Oh, I think we might be able to get away with that one, Dave.'"
(Taken from the DVD Live at Pompeii: The Director's Cut)

Earl's Court Arena, London,
May 1973.
(Jill Furmanovsky)

Waters making the best of on-tour downtime in 1974. "When you get to that size, there's no prayer in hell of everyone being there because they love your music . . ."
(Jill Furmanovsky)

Dark Side comic
(Nick Mason's Archive)