Check out www.historicmapworks.com <http://www.historicmapworks.com/> this site contains county and township maps from the 1870's for what appears to be the entire USA. Click on search maps and do a search for Washington County and Pennsylvania to get to the township maps. They have the land holders names and acreage shown on them. Great information if you want to know where your ancestors lived during this time period! Wayne Rizor www.garden-sundial.com <http://www.garden-sundial.com/>