Hmm, it seems Gustav Holst wrote a series of choral works based on Tennyson poems, including one called "O swallow, swallow."
I think I've mentioned before that my grandmother's maiden name was Swallow. (It's only really funny if you know that my real surname isn't Now.)
Anyway, I'm, erm, delighted to see the amount of serious discussion of music I've sparked off by means of a carefully-placed post early this morning before I spent the rest of the day off-line. I think I deserve at least one-and-a-half bananas before I go to bed, no?