Hi
The birth of the illegitmate Sugden wasn't registered - she was baptised. Parents, one or either are not necessarily present at baptisms as on adult baptisms. Rachel may just have been there on her own.
There easily seems enough connections as the thread has gone along to tie the two Samuels together with also William and John.
I think Sarah is Samuel senior's daughter on the 1841 census - the daughter baptised 1801 in Leeds (adult ages, those over 15 were usually rounded down to the nearest 5 on the 1841 census, but that would still be a slight more adjustment to get to 30) so maybe a later Sarah?
1871 census RG10 429 folio 60
12 and 16 Aldermanbury St Mary The Virgin Aldermanbury, London
Sarah Sugden 66 Unmarried Housekeeper Leeds, Yorkshire
with two servants and a watchman on duty
with Samuel junior as his sister on the 1881 and 1891 censuses in Edmonton
More interesting in where she is and who she is with on the 1851 census
1851 census HO107 15?3 or 8 folio 154
31 Rodney Street St James Clerkenwell
Sarah Sugden 85 Head Widow Artificial florist Leeds Yorkshire
Sarah Sugden 40 Daughter Unmarried Artificial florist Leeds Yorkshire
William Sugden 27 Grandson Unmarried Warehouseman Dorking Surrey
John Sugden 24 Grandson Unmarried Warehouseman Southwark Surrey
Samuel Sugden 22 Grandson Warehousman St Pancras Middlesex
plus 1 house servant
Most likely death registration though there is one in Stepney in the same quarter
Deaths Sep 1858 Sugden Sarah London City 1c 55
John the grandson was the son of John and Martha
6th May 1821 St Mary, Newington
John Sugden
Martha Collitt
Bachelor and spinster of the parish
both signed
Witnesses William Williams and F Collitt
St Saviour Southwark 16th November 1823 born 20th February 1820
Thomas Collett Sugden parents John and Martha, St Georges, father's occuaption watchmaker
St Saviour Southwark 18th August 1822 born 16th May
Henry Sugden parents John and Martha, Talbot Inn, father's occupation Carrier
Baptism in Dorking already given
16th April 1826 St Mary Magdalen Old Fish Street City of London born 23rd January
John Sugden parents John and Martha, New Inn Old Change, father's occupation Book keeper
Samuel and Elizabeth's son John died young
St Sepulchre 14th February 1827
John Sugden 8 months, Angel Court
as did their son Frederick
same church 10th November 1827
Frederick Sugden aged 3, Angel Court
St Pancras Parish Church 3rd July 1860
John Sugden Full Bachelor Warehousman St Mary Aldermanbury City of London Dead
Maria Linsell Full Spinster St Pancras John Linsell Dead
Both signed
Witnesses Wm Geo Garnier? and Lydia Lo?
This would be the John the nephew in Sugden, Son and Nephew
Regards
Valda