There are 2 titles associated with this person.

@book{ wphp_536
  author={Ellis,Sarah Stickney},
  year={1833},
  title={The Missionary; or, Christian's New Year's Gift},
  publisher={},
  address={London},    }
@book{ wphp_1159
  author={Sherwood,Mary Martha},
  year={1835},
  title={Caroline Mordaunt; or, The Governess. By Mrs. Sherwood.},
  publisher={William Darton and Son},
  address={London},    }