Thanks, I did get a nice reply from Leon Berger, the Donald Swann Archivist on the Donald Swann website. I need to go through Harper-Collins publisher. I am undecided whether to proceed with a CD. However there's only one commercial recording (LP) of the song cycle that I know of with Donald Swann on piano and William Elvin singing, and that is out of print and hard to find.

Cheers, S. in Seattle