There are 2 titles associated with this person.

@book{ wphp_6089
  author={Delany,Mary},
  year={1778},
  title={A catalogue of plants copyed from nature in paper mosaick, finished in the year 1778, and disposed in alphabetical order, according to the generic and specific names of Linnæus.},
  publisher={s.n. [sine nomine]},
  address={London},    }
@book{ wphp_361
  author={Delany,Mary},
  year={1820},
  title={Letters from Mrs. Delany (widow of Doctor Patrick Delany) to Mrs. Frances Hamilton, from the year 1779 to the year 1788; comprising many unpublished and interesting anecdotes of their late Majesties and the Royal Family},
  publisher={Longman, Hurst, Rees, Orme, and Brown \& },
  address={London},    }