I've just tracked down a photo I once took of William and Mary's gravestone at Kibworth; this is the inscription:
To
The memory of
William Lole
and Mary his wife
He died March 20
1765 aged 68 years
She died July the 6th
1770 aged 93 years
I hadn't noticed that age difference before! It doesn't sound terribly likely but the photo looks clear enough! It would account for their not having had any children when they married in 1730!
Anyway, that gives useful potential dob for William of 1697 (and for Mary of 1677 -- the cradle snatcher!)