Castle Rising comes under Kings Lynn doesnt it , there is 2 baptisms there for Mary carters ;;;

County Norfolk
Place Kings Lynn
Church St Nicholas
RegisterNumber
DateOfBirth
BaptismDate 10 Feb 1771
Forename Mary
Sex F
FatherForename Thomas
MotherForename Bridget
FatherSurname CARTER
MotherSurname
Abode
FatherOccupation
Notes
FileNumber 1018

County Norfolk
Place Kings Lynn
Church St Nicholas
RegisterNumber
DateOfBirth
BaptismDate 09 Sep 1776
Forename Mary
Sex F
FatherForename William
MotherForename Mary
FatherSurname CARTER
MotherSurname
Abode
FatherOccupation
Notes
FileNumber 1018

Theres no way of really knowing though is there