There are 9 titles associated with this firm.

@book{ wphp_13147
  author={Kilner,Mary Ann},
  year={1790},
  title={A course of lectures for Sunday evenings; containing religious advice to young persons. Fifth edition.},
  publisher={John Marshall I [Aldermary] \& },
  address={London},    }
@book{ wphp_10279
  author={Sandham,Elizabeth},
  year={1805},
  title={The twin sisters, or, The advantages of religion.},
  publisher={John Harris [1802-1819, 1824-1843] \& },
  address={London},    }
@book{ wphp_8709
  author={Roberts,Mrs. D.},
  year={1806},
  title={Delmore, or Modern Friendship. A Novel. In Three Volumes. By Mrs. Roberts.},
  publisher={},
  address={London},    }
@book{ wphp_10321
  author={Claris de Florian,Jean Pierre},
  year={1806},
  title={Select fables: written for the purpose of instilling into the minds of early youth, a true sense of religion and virtue. Translated from the French of Mons. Florian, by the author of "A cup of sweets;" "Gertrude;" "Summer rambles;" "Short stories;" &c.},
  publisher={John Harris [1802-1819, 1824-1843] \& },
  address={London},    }
@book{ wphp_10172
  author={Kilner,Dorothy},
  year={1807},
  title={Essays on moral and religious subjects: calculated to increase the love of God and the growth of virtue in the youthful mind. By M. Pelham.},
  publisher={John Harris [1802-1819, 1824-1843] \& },
  address={London},    }
@book{ wphp_11952
  author={Trimmer,Sarah},
  year={1807},
  title={The ladder to learning: a select collection of fables, consisting of words of one, two, and three syllables, with original morals. Ornamented with a great variety of engravings on wood. New edition revised and corrected.},
  publisher={John Harris [1802-1819, 1824-1843] \& },
  address={London},    }
@book{ wphp_10948
  author={Trimmer,Sarah},
  year={1811},
  title={A new series of prints accompanied by easy lessons: containing a general outline of antient history. By Mrs. Trimmer.},
  publisher={John Hatchard [190 Piccadilly] \& John Harris [1802-1819, 1824-1843] \& },
  address={London},    }
@book{ wphp_302
  author={Trimmer,Sarah},
  year={1811},
  title={Sermons for Family Reading. Abridged from the Works of Eminent Divines. By the late Mrs. Trimmer.},
  publisher={John Hatchard [190 Piccadilly] \& John and Francis Rivington},
  address={London},    }
@book{ wphp_8939
  author={Owenson,Sydney},
  year={1811},
  title={The Missionary: An Indian Tale. By Miss Owenson. With a Portrait of the Author. In Three Volumes. Second Edition.},
  publisher={John Joseph Stockdale [41 Pall Mall] \& },
  address={London},    }