If it helps at all, here's Hannah in 1861
RG9 1084 fol.83 p.28 North St, Prittlewell, Essex
FULLER
Hannah head wid 64 Gardener's widow
Hannah dau s 29
Sarah Jane " m 20
Frederick gson 7 Scholar
all born Prittlewell
+ 7 lodgers
I see your problem with John, and a death cert would help with his age, but as you obviously know, there are so many John Williams 1865-1871.
Barbara