Darn. I saw the title and was briefly very excited to think you'd found a band that made early prog rock using nothing but these.
The first album cover, anyway, is a woodcut by Erhard Schon depicting the Devil playing the head of a monk like a bagpipe. More generally, medieval bagpipes were sometimes decorated to look like heads.
Fuck me, I love those books. Except Titus Alone. That was tough going.
I think that there's a farting bagpipe somewhere in the Hieronymus Bosch zone, but GoogleImage doesn't call it up.
