There are 2 titles associated with this person.

@book{ wphp_6605
  author={De La Garde,Mary},
  year={1796},
  title={Essays on various subjects: in which some characters of the present age are introduced.},
  publisher={},
  address={London},    }
@book{ wphp_6600
  author={Guppy,Sarah and De La Garde,Mary},
  year={1800},
  title={Essays on various subjects: in which some characters of the present age are introduced. By M. de la Garde, Formerly of the Island of Jersey, and Author of the Candid Friend. Second edition. To which is added some poetical pieces, by Mrs. Guppy.},
  publisher={},
  address={Bristol},    }