There are 4 titles associated with this firm.

@book{ wphp_14289
  author={Child,Lydia Maria Francis},
  year={1824},
  title={Hobomok, a tale of early times. By an American.},
  publisher={Cummings, Hilliard and Co. \& },
  address={Boston},    }
@book{ wphp_19575
  author={Sedgwick,Catharine Maria},
  year={1825},
  title={The Travellers;  A Tale. Designed for Young People. By the Author of Redwood.},
  publisher={E. Bliss and E. White \& },
  address={New York},    }
@book{ wphp_14292
  author={Child,Lydia Maria Francis},
  year={1825},
  title={The rebels; or, Boston before the revolution. By the author of Hobomok.},
  publisher={Cummings, Hilliard and Co.},
  address={Boston},    }
@book{ wphp_18923
  author={Opie,Amelia},
  year={1826},
  title={Illustrations of lying, in all its branches. By Amelia Opie. From the second London edition.},
  publisher={Munroe and Francis [128 Washington] \& Samuel Hale Parker [164 Washington] \& Leonard C. Bowles \& Richardson & Lord \& Cummings, Hilliard and Co. \& Cottons and Barnard \& Crocker and Brewster \& R. P. and C. Williams \& Gaylord and Hatch \& Harrison Gray},
  address={Boston},    }