Mindthtrams, I think this is what puzzles so many people. He did indeed do a great deal to promote traditional music (I have two of his Irish tunebooks), which is why it is such a mystery that he refuses to release the material he owns.

If you do indeed know him then please ask him why, if he doesn't think it's worthwhile commercially for him to release these albums, he won't give permission for the musicians themselves to do it.