Warthur
This is the dictionary definition of Collectors/fans only: a compilation of rarities from the Pendragon archives, that originally came out as a free gift for fan club members. It proved appealing enough that it went on general sale, and had a sequel volume produced too, but both it and its companion are best regarded as what they were originally intended to be: a nice bonus for people already in love with the band, not an appeal to those who might be encountering the group in the first time.
The production values aren't great - nothing's unlistenable, per say, but the sound is fuzzy on some of the tracks and there's the occasional tape error. The running order is a little odd - show-closer Stan and Ollie would work much better as the final track - but it's otherwise fairly consistent, an interesting trip through the first decade of Pendragon's existence.