After reading a post about the upcoming end of a Renaissance performance group and the effect it was having on one of the performers in it, I found myself quietly humming part of a tune that seems to fit, in attitude if not exactly in lyrics. It's not a Renaissance piece, but something from the First World War. If you've heard it, you know the feeling of forlorn wistfulness which it conveys.
( Lyrics, or at least some of them. )