There are 3 titles associated with this firm.

@book{ wphp_7576
  author={Hume,Sophia},
  year={1766},
  title={A caution to such as observe days and times: to which is added, an address to magistrates, parents, masters of families, &c. By Sophia Hume. The fifth edition.},
  publisher={},
  address={London},    }
@book{ wphp_24932
  author={Unknown,},
  year={1769},
  title={The comments of bull face double fee, on the petition of the freeholders of the county of Middlesex; abounding with the most scurrilous abuse, indecent Invectives, and audacious Manaces; against the petitioners, and every other Person concerned in preparing and supporting that Petition, continued in the Gazeteer, from the 6th of June last, to the 7th of July inclusive},
  publisher={},
  address={London},    }
@book{ wphp_11647
  author={Unknown,[Woman]},
  year={1772},
  title={Original Poems on Various Subjects, by a Young Lady, Eighteen Years of Age.},
  publisher={Thomas Cadell [London] \& Thomas Norton Longman III \& William Nicoll \& James Ridley},
  address={London},    }