Re Bright Morning Star - as opposed to Watch The Stars (that's a red herring as far as this thread is concerned):
Yes indeed, Swan Arcade it was - also there was Peter Bellamy's wondrous rendition. And there's a live acappella version by the Incredible String Band which ain't bad too.

Haven't heard the Judy Collins version, but it appears to have significant differences - curious. Anyone know which LP it was released on?