There are 2 titles associated with this person.

@book{ wphp_9612
  author={West,Jane and Porter,Anna Maria and Opie,Amelia and Lewis,Lady Theresa and Mitford,Mary Russell and Marley,Mrs. and Landon,Letitia Elizabeth and Hawkins,Laetitia-Matilda and Grant,Anne and Bury,Charlotte Susan Maria Campbell and Bannerman,Anne and Baillie,Mrs. Alexander and Baillie,Joanna},
  year={1829},
  title={The Casket, a Miscellany, Consisting of Unpublished Poems},
  publisher={John Murray II [Albemarle] \& },
  address={London},    }
@book{ wphp_1386
  author={Lewis,Lady Theresa},
  year={1834},
  title={Dacre: A Novel. Edited By the Countess of Morley. In Three Volumes.},
  publisher={Longman, Rees, Orme, Brown, Green and Longman \& },
  address={London},    }