I'd love to have more info about many of these tracks. Were they improvisations or fully formed songs? Take Frank's Dark Past: beyond "what on earth was that all about?", I'm interested to know if it was a fully formed song was it ever rehearsed or demoed? Likewise for Walk Tall and Tail of a Comet. Apart from appearing to be pretty fully formed, the band seem to know them. The same can be said for Same Language as Me and Burnt Out Tree (a track Peter Green can't have known too much about because it was left untitled on the fan club CD from which it was taken (unless, of course, PG wanted it to be a surprise).