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Thomas Blois and Sarah Skales are candidate parents for an Elizabeth Blois who married William Smith in Dagenham in 1787 and died there in 1856. In the 1851 census she says she was born in Stratton about 1767. She had sisters Mary and Charlotte and another possible sister Tabitha who died age 63 in 1844. None of the sisters could write and most ages associated with them need to be treated with caution. All lived in Dagenham at some time.
Tabitha is the reason I am considering Thomas Blois and Sarah Skales as potential parents and Charlotte is an argument against that identification, since I can find no record of Thomas and Sarah having a daughter Charlotte.
From the registers available on familysearch I have identified 5 children to a Thomas and Sarah Blois at Flordon - Sarah 1760, Mary 1762, Susanna 1765, Ann 1767, Elizabeth 1769 and then the 5 previously mentioned at Long Stratton from 1770 to 1776. I have no direct evidence to show it is the one family but there are no more baptisms for Thomas and Sarah at Flordon after 1769 and none before 1770 at Long Stratton.
The Flordon baptisms of Mary and Elizabeth are a fairly close match to the Dagenham women and if the identification is correct then Elizabeth has lived at Long Stratton since she was 1, so may have believed she was born there. The Tabitha baptised at Long Stratton is too old for the Dagenham burial if her age is correct, but it could well be wrong.
The main stumbling block is Charlotte. She married in 1794, so is probably born before 1773. There is a potential gap between Tabitha and Thomas at Long Stratton where Charlotte could be born in in 1772, but the timing is very tight.
There are potential burials for Thomas Blois in 1813 and Sarah Skales in 1825 (age 91) at Long Stratton.
I have looked at most Blois entries in the registers for Norfolk in the 18th century and think Thomas of Flordon may have been born in Pulham, but have no proof.
Does any of this match your information?