There are 2 titles associated with this firm.

@book{ wphp_19101
  author={Porter,Jane},
  year={1810},
  title={The Scottish chiefs, a romance. : Five volumes in two. By Miss Jane Porter, author of Thaddeus of Warsaw, and Remarks on Sidney's aphorisms. (From the London edition of 1810.)},
  publisher={David Longworth \& },
  address={New York},    }
@book{ wphp_10349
  author={Umphelby,Fanny},
  year={1825},
  title={262 questions & answers, or, The children's guide to knowledge: being a collection of useful and familiar questions, on every day subjects, adapted for young children, and arranged in the easiest and plainest language. By a lady.},
  publisher={},
  address={Thetford},    }