The following listing, grabbed from Wikipedia, will probably end up largely unexplored (availability will probably be the key issue in that regard) but serves as a reminder of the depth and breadth of a singularly idiosyncratic individual’s musical and mythological meanderings.
1972 Myrrh
1977 Journey's Edge (with The Merry Band)
1978 American Stonehenge (with The Merry Band)
1979 A Glint At The Kindling (with The Merry Band)
1981 Songs of Love & Parting The Fisherman's Son And The Gruagach of Tricks
1982 Prince Dougie And The Swan Maiden Rory Mor And The Gruagach Gaire
1983 Music for the Mabinogi
1984 Selected Writings Five Humorous Tales of Scotland and Ireland
1985 The Dragon Has Two Tongues Five Celtic Tales of Enchantment Five Legendary Histories Of Britain Five Bardic Mysteries Five Tales of Prodigies and Marvels
1986 Legacy of the Scottish Harpers Legacy of the Scottish Harpers Volume Two Winter's Turning
1987 Songs For Children of All Ages
1988 Ten of Songs
1990 Music For The Newly Born