Hi Naffie Girl
The only marriage that I can find for a Thomas Cox in 1861 is this one
Thomas Cox
1863
St George in the East,
London/Middlesex
on the same page is a
Fanny Jemimia Laing
Jane Sophia Pettitt
and
Charles Isaac Chambers
Vol 1c
page 901
On ths 1861 census there is this person
Fanny Laing servant u/m 34 female servant Beds Old Warden
must admit she is down St Helens, Hampshire, which is a long way from Lincs
1851
She is in Kent aged 26
ricky