Well, Bojangles, you can do a search of the Digital Tradition folk song database from the search box in the upprer-right corner of this page. Enter phrases like [to morrow] in square brackets, and you'll get only those songs that contain that exact phrase.
You can find previous discussions of a song by using the 'forum search' from the main forum page. You can cheat if you want, though - In the third message from the top on this page, I posted links to both the lyrics and the previous discussion.
It's a good idea to check both the Digital Tradition database and to do a forum search before starting a new thread. It doesn't hurt to bring up a thread that's a year old and add to it - that makes things easier to find than if you start a whole new thread.
-Joe Offer-