here she is on the 1861 census:
Durham City 1861 Census, Elvet (RG9/3737 Folio 40, Page 5)
John Blackburn, Head, married, 27, Chemist & Druggist, born Durham, County Durham
Eleanor Blackburn, Wife, married, 23, born Durham, County Durham
Ursale Dodds, servant, unmarried, 17, House Servant, born Ayton/Eighton Banks, County Durham
Diddy