Hi Debbie,

in 1871, she has two children with her, Emily (8yrs) and Francis (11 Months) so based on the wedding date of 1869, Emily may have been Georges Daughter from a previous marriage, or Susannahs daughter, who took on the Coates surname. George T Coates was 10 in 1881, so he must have been born after the 1871 census. So if George was the father, he must have died around 1870-71. Emily and Francis are not with Susannah in 1881, I wonder what happened to them?
Still struggling with a death for George so thought I would look at the childrens' births to see if I could narrow it down and you did mention you couldn't find Emily and Francis in 1881 - neither can I but ....
I think this is Emily - 3rd qtr 1862 Liverpool 8b 121. Her birth certificate should tell you who her mother was and therefore the name of George's first wife - if indeed he had been married before. The George Coates/Susannah Lewis marriage certificate will tell you if he was a bachelor or widower in 1869.
I wonder if Emily died, aged 8 - 2nd qtr 1871 Liverpool 8b 87

- she was there in 1871 but missing in 1881 and the 1871 census was taken on 2 Apr.
You mentioned a son - George T Coates who was 10 in 1881. There is also a son Francis Coates on the 1871 census, aged 11 months. I can't see a birth for either of them but .... there is:-
George Francis Coates
3rd qtr 1870 Liverpool 8b 103
Looking at the original 1881 census what has been transcribed as a "T" could very well be an "F".
So may be they are the same person

.
In 1901, this might be him:-
129 Rilson Street, Toxteth Park, Liverpool
George F Coates 30 head mar commercial clerk born Liverpool
Ann Coates 28 wife mar born Liverpool
William F Coates 2 son born Liverpool
Fredrick Coates 3 weeks son born Liverpool
Class: RG13; Piece: 3437; Folio: 87; Page: 25.
There is a marriage on Lancs BMD -
www.lancashirebmd.org.uk - in 1898 - George F Coates/Ann Price Walton St Mary Liverpool
Luzzu