There are 2 titles associated with this firm.

@book{ wphp_6385
  author={Masters,Mary},
  year={1755},
  title={Familiar letters and poems on several occasions. By Mary Masters.},
  publisher={},
  address={London},    }
@book{ wphp_15141
  author={Ayscough,Samuel},
  year={1789},
  title={A general index to the first fifty-six volumes of the Gentleman's Magazine, From its Commencement in the Year 1731, to the End of 1786. Compiled by Samuel Ayscough, Clerk, Assistant Librarian of the British Museum. In two volumes. ... : containing An index to the essays, dissertations, and historical passages.},
  publisher={David Henry \& },
  address={London},    }