Audrey - have you hit the jackpot!!I am researching the family of Cornelius Atherton b 1736 Harvard MA (Hiram's father)and have a great deal of information. My great grandfather was Milton Atherton b 1824 in Cayuga NY whose parents are listed as Cornelius and Mary Atherton. I have not been able to make the connection to the older Cornelius. Could Hiram's son Cornelius be his father?Hope this connects.I will e-mail you directly with details.