Hi
Nothing conclusive, but maybe some pointers.
There is a John & Frances Hill baptising children in the 1770's in Kirmington, very close to Great Limber and East Halton, they can be found on FreeREG and Family Search. There are a couple of Marriages on FreeREG that would fit.
The marriage is quite informative, giving parishes, witnesses etc, but no parents, link below.
http://www.freereg.org.uk/cgi/SearchResults.pl?RecordType=Marriages&RecordID=19496681841 census has a Frances Cook aged 70, b. abt 1771 and living in Barton. (may not be correct Frances, though I can't see another in date range.)
A popular BI has:
11 Aug 1842 Frances Cook aged 73, Great Limber, St Peter, bur. (puts the birth/bap. back to 1769)
Geoff