Michael Ackermann kindly sends BtP this concert handbill from more than forty years ago.
It specifies the songs that Procol Harum will choose from – in the absence of a setlist, this is a pretty good guide to the content of the evening.
It also names the members of the band including 'Matthew Smith' and explains the 'Harum shuffle' by which Robin Trower and BJ Wilson came into the picture.
See a similar item here