IF the NSW BDM is correct with the parents of Sarah A Jennings/Beer parents John and Mary beer then I may have them in the 1861 Census.
They are at.
36, Upper William Street
Parish Marylebone
District Marylebone, St John, London, Middlesex.
Head John L Beer b1824, Cordwainer, Wife Mary b1826, John J b1847 errand boy, Sarah b 1851, Catherine b1853, Elizabeth 1855 and William b1861.
As with most of these census birth years they all seem wrong.
In the 1871 census they are at,
Benjamin Street
Parish St Sepulchre Middlesex
District Holborn, Saffron Hill, London, Middlesex.
John and Mary young William who is now 14 years old b 1857??, also is new children Annie 1864 and Frederick 1870.
I cannot find them on 1881.
Neil