Janet
I have a Sarah Anne Tinkler, born at Hemingford Grey near St Ives, Huntingdon on April 11, 1823, the daughter of a labourer John Tinkler and his wife Virtue Tinkler (nee Tame). Could this be the one you are looking for?
I think, but have not proved, that she married a James Crocker (I don't know where or when). In the 1861 census, she was living with her mother, Virtue Tinkler, and her 1-year old daughter, Louisa Crocker, at Grays Inn Terrace, Holborn, London.
John Tinkler and Virtue Tame are my great great great grand parents. If we are related, I have some more information.
Regards
Steve Williams