I found a book in my library entitled "Folksongs of Britain and Ireland" by Peter Kennedy. It's huge, pretty old-looking and has probably been in the library since the American Occupation. If you can find it, this has songs in Irish, Scottish, Welsh, Cornish, English, songs for drinking, unrequited love, weddings, etc.etc. You gotta see this book...it's even got the notes (tunes) written down.