I knew this, and have long prized a now-worn cassette I made years ago of this long out-of-print material. Eventually I managed to find a copy of the album, worthwhile in itself for the extensive liner notes by L. Sprague de Camp recapping Dunsany's career and importance.**
But I did not know that more recently yet someone put one of the Dunsany/Price stories up on You-Tube (thanks to JC for the link). If you've never read this, and are curious about what seems to have been Tolkien's favorite Dunsany story, give it a try:
--current reading: FANTASIES OF TIME AND DEATH: DUNSANY, EDDISON, TOLKIEN (Vaniniskya 2020)
*the other two stories, both drawn from the Jorkens series, are of less interest as stories, being overly repetitive, but Price does a good job on them as well.
**one of these days I'll find a copy of THE KING OF ELFLAND'S DAUGHTER concept album as well to supplement my cat-scratched copy of that odd but endearing effort.