This is one of my favorite pieces of music. Just a perfect, perfect creation.
But what I found was this very interesting discussion and dissection of the music. Very informative!! There appear to be 4 total...worth some time if you have it.
As a commenter notes, "If you have iTunes, get the version performed by the Academy of St. Martin-in-the-Fields, conducted by Sir Neville Marriner. It comes with "The Lark Ascending," "Fantasia on Greensleeves" and "Five Variants of 'Dives and Lazarus.'" It's $9.99 and it's absolutely gorgeous. "
It truly is the best version I've found and the entire CD is like the score for a dream of heaven.
Joe Bob says check it out.