To be honest my only memories of this 1970 album are of the garish cover staring out at me in the second-hand bins. I should have picked it up, as vinyl copies now go for more than $600 - and one spin reveals why it is so prized by collectors.

The sound is a trippy mixture of British blues and heavy rock. The psychedelic lyrics are dated, but the sound is remarkably fresh, avoiding the turgid grind that plagued many prog-rock binds of the time. The obvious comparison is with supergroup Cream - one of the bonus tracks from a 2005 reunion show is a cover of Politician - with Bob Daisley's bass playing eerily similar to the distinctive fuzzy tone of Jack Bruce While Cream was a power trio, the four-piece Australian outfit features a pair of lead guitarists, Dennis Wilson and Tim Gaze, whose interplay is particularly impressive in the nine-minute closer Parade of Fools.