Jeff, Dermot and Scott,
I hear you loud and clear; don't mess with Neil's masterpiece. Good advice no doubt.
I don't think anyone is suggesting that lyrics would improve this beautiful piece. Actually, I think the fact that anyone is even suggesting it is an indication of what an evocative piece it is.
I've only tried it a few times, and only recently, but I do enjoy trying to develop lyrics for instrumentals that capture my attention. One day I hope to write songs from scratch. For now toying with lyrics now and then is a fun path into creativity.
Pierre, and anyone else who's interested in the idea of lyrics, send them my way. I'd love to see and hear what you come up with, sing them if you can. I'd send the same toward you, if I come up with something that's a good enough rough draft.
Don't worry guys, the Master's creation is safe.

I won't go drawing a moustache on the Mona Lisa - well not on the forum anyway.
Shel