Oliver Bennett's grave lists his birthdate as 1750 although the research I've seen lists it as 1758 in Preston, New London, Connecticut. His family lived in New York state for some time and some of his brothers were born there. He married Catherine Mullen in 1777 in PA, is listed in Luzerne Co., PA on the early census and came to Delaware Co. about 1810 with the Mullens and a couple of his brothers and their families. He and at least 2 of his brothers (and some of their family) are buried in RedBank Cemetery in Genoa Twp.
I don't have a picture of his grave but can easily get one. E-mail firstname.lastname@example.org