Since I have received several e-mails concerning this map I will reply through the digest. I obtained a photocopy of this map a few years ago before I knew the importance of sources. However, I do have one cryptic note from a visit to the Mercer Co. Historical Society which says "get copy of 1860 map of Mercer (pg 5) on next visit" There is also the possiblity that the house I was locating was built around 1860 and that the map is actually an 1873 map. Sorry for the confusion. I will endeavor to track the correct date down. Gayle