Lots of good work, Gibb. Do we stop here or do we try to figure out how we got from here to the "later collections"? There seem to be some interesting discontinuities, but I'm not sure how to lay them out. You've done an excellent job pointing out on numerous occasions some of the probable "continuities" where someone has "borrowed" from someone else. But is it my reading or something else that a significant number of the chanties that we have found so far don't show up in the "later collections"? And almost all of a sudden "new" ones (albeit somewhat more familiar to us at times) start showing up.   What happened?