It's been a long day, and I don't have the energy to go into the 'Welsh' thing raised above, but it's worth noting that the Welsh have next to no ornamentation (just the occasional passing note) in song and very little in tunes. However, if you can get hold of a book, "Welsh Music History 1" (Ed. John Harper, Univ. Wales Press, Cardiff 1996) there's a good essay by Phyllis Kinney, "An Irish/Welsh Tune Family" tracing the Welsh variations on "St Patrick's Day in the Morning" and giving 22 Welssh examples - some which are quite amazing (if you know Welsh songs).

siân