Would you mind counting me in if you have some info??? Part of my folk music site is Popular Songs in American History (http://www.contemplator.com/america.html). Sometimes I just take a "best guess" as to what era a tune fits. Child ballads, for instance, I almost always put earlier than the verified printed dates because they have a long oral tradition...

Although I have a lot of sources for British folk, my American sources are pretty meagre. While we're at it, any suggestions?