I wish I had the answer for you but I did find that in the 1870 Fed Census a William J Roe lived next door to Polly and her family. Is it possible they were related? Also, in the 1880 Fed Census a David Roe was living next door to William Roe. They may have been related. If you can't find the info looking for Polly, maybe researching William and David might lead you there. Hope this helps at least a little.