One of the many reasons I am currently alternating posts on these two bands is that in 1971 they both released albums called “Relics”:
More of these in due course, God willing.
In the meantime, note that the PF Relics was only ever a single LP. In a typically confusing manner here, though, there is a single LP ISB Relics AND a double one! It is the double one shown here. I bought the single one first but gave this to my sister when I got the double one.