You might find this article interesting about DNA and genealogy. http://www.msnbc.com/news/generoots_front.asp?0si=- Retrospect Publishing has some interesting searchable resources for Pennsylvania. Costs $$ but there may be something there for you. http://www.retrospectpublishing.com These two interesting sites come from Dick Eastman's newsletter which I highly recommend. http://www.rootsforum.com Bette