There are 3 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_17696
  author={H.,E.},
  year={1810},
  title={The fatal cabinet; or The profligate mother. Two volumes in one.},
  publisher={Isaiah Thomas, Jun. \& },
  address={Boston},    }
@book{ wphp_18748
  author={More,Hannah},
  year={1814},
  title={Thoughts on the importance of the manners of the great, to general society. By Hannah Moore.},
  publisher={Isaiah Thomas, Jun. \& },
  address={Boston},    }