I don't know much about Polly. other than she is supposed to be buried in the Mt. Riga cemetery in Salisbury. I looked for the grave a month or so ago and couldn't find it. Dean Bishop Jr. and Sheldon and Nelson Bishop were all sons of Dean and Esther Bishop. Dean and Esther are buried in the Spencers Corners Cemetery in millerton NY. I couldn't fid their graves either.
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=Bi...; I did find Angeline Bishop's grave. She was Sheldon's wife. I believe they were divorced. Don't know where Sheldon is buried. I just started working on the Bishop line. As I learn more I will share what I find.