Thread: Sarah SELLWOOD Nee Chapman Berkshire

Hello,
For some reason, although I am logged in and have been a member for some time, I am not able to post a thread on the Big Help page
So I am posting it here.
My problem is that I cannot find my 2nd great grandmother's baptism or burial.
Sarah Chapman married Thomas Sellwood in Tilehurst, Berks in 1827. I have the marriage entry.
In 1841 they were in Tilehurst and Sarah age 35 said "born in County". In 1851, though, still in Tilehurst, she, age 44, said born Basingstoke Hants.
In 1861, husband Thomas, still saying "married" is a lodger in Theale, a couple of miles away. I cannot find Sarah! Later that year Thomas died in Bradfield Workhouse.
I haven't been able to find a baptism, death or burial for Sarah dead or alive, so I haven't been able to follow her backwards.
Any help gratefully received.
Victoria