Two Peter Masseys born Selston. The older one b 1842 s/o Matthew Massey and Elizabeth nee brian / Bryan who married in Alfreton, Derbys on 25 Aug 1841.
The younger one b 1843 s/o John and Ann. Mmn given as Weston on GRO index.
Can find Matthew and family in 1851 but not John and family
If we are hoping this was the family of Fanny Massey b c 1837 Nottinghamshire, then other than the Fanny in 1851 indicating her age was 19, ( 14/15 would have been better) then John Massey in 1851 gives:-
John Massey 41 Widower occ Lab in Iron Works b Kirkby
William 16 b Kirkby
Mary Ann 14 b Kirkby ( baptised 1836)
Elizabeth 10 b Kirkby
Peter 7 b Selston
Hannah 5 b Selston
Sarah 3 b Selston
Residing at Church Lane, Selston
Census ref HO107/2125/85/25
Keyboard86
Sorry Lizzie did not scroll far enough forward!
PS re the Frances Massey b 1837 Leeds you located in 1851 Leeds, Father Henry, in 1871 she is with brother Henry 37 b Leeds, Mother Harriet 66 b Alfreton, Frances 34 b Leeds in Derbyshire
Census ref RG10/3561/124/25
Also happy now that the 19 year old Fanny in 1851, who had a child John in 1852/3 is not the daughter of John, but of William & Sarah, her baptism was Fanny Massey 30th September 1832 St Wilfrid Father William Mother Sarah
Fanny Massey married Anthony Lowe St Wilfrid, Kirkby in Ashfield 29th Oct 1852
John Massey did not die young, he is John Massey Lowe aged 8
Census ref RG09/2433/83/57