In fact, I do have Return of the Grievous Angel by Lucinda Williams and David Crosby on my playlist, but somehow failed to put it in the post. Also Sin City and In My Hour of Darkness, from the same tribute CD. I believe that the former has Emmylou singing with someone else who I don't know (I don't have the liner notes). If anyone knows let me know.

Will look for the others. I also realized I possess the Natalie/Nat recordings that someone mentioned and didn't include them, so there is more to add. Always will be.

R.