Listening to Ummagumma for the first time, which as suspected, is unlistenable hippy nonsense. However, I am interested that the cover art includes the cover art of another album - the soundtrack to Gigi. After racking my brains, I couldn’t think of another example of cover art that includes the covers of other albums, until my friend mentioned Dylan’s Bringing it All Back Home, which features album covers by both Eric Von Schmidt, and Lotte Lenya.
Hive mind?