Having said there is not that much interest, if you go to the top of the page and click on "Lyrics & Knowledge," it will take you to a search box. Enter some of the lyrics mentioned in this thread, or "Come Thou Fount," etc. and it is likely several threads will show up. Some of the discussion will end up being circular, because these old hymns with all their variations, verse and tune exchanges, etc., are organic and there is no one, clear, origin. Still might be informative for you.