From the 1841 and 1851 census I have found John Parker b c1800 of Kingston Surrey (Oil labourer/ Oil puncher) and wife Sarah c1806 of either Wandsworth Surrey or Bethnal Green, Middlesex - living in Flood Street Deptford. (The 1861 census shows Sarah as a widow, living in Addey Street Deptford).
From census and baptism records I think they had 11 children between 1828 and 1852.
I tried searching the GRO birth records for those children born after 1837 (Amos, Richard, Susanna, James, Charles and Jane) to find Sarah's maiden name so that I could investigate her further - but no luck!!
Any help gratefully received.