Just an update...
I decided to purchase the MOCA series for York County cemeteries to see if I could find William Johnson's grave. He is not listed in any of the cemeteries they transcribed in York County. Re-reading the History of Limington, it appears that there is, or was, a Johnson Cemetery there and I suspect he most likely is buried in this Johnson Cemetery in Limington...which was not part of those that MOCA transcribed. I have written the Limington Historical Society to see if they know of anyone that could look in that cemetery for me, but have gotten no response thus far. If I do not hear from them, I may try the Limington town clerk. Need me to look for anyone in the York County MOCA CD?