There is a Will for James Bennett which I have recently put on the site. There is also the following MI in Bigland.

In Memory of
JAMES BENNETT,
who departed this Life,
Oct 13, 1747, Aged 3 Years.
Also MARY, the Wife of
JAMES BENNETT, Senior,
who died Jan 2, 1757.
Also the Body of
BETTE, the Wife, of JAMES BENNETT,
buried March 18, 1778,
Aged 69 Years.