There are 2 titles associated with this firm.

@book{ wphp_6203
  author={Deverell,Mary},
  year={1784},
  title={Theodora & Didymus, or, the exemplification of pure love and vital religion. An heroic poem, in three cantos. By Mrs. Mary Deverell, Gloucestershire.},
  publisher={},
  address={London},    }
@book{ wphp_6176
  author={Deverell,Mary},
  year={1786},
  title={Theodora and Didymus, or, the exemplification of pure love and vital religion. An heroic poem, in three cantos. With an appendix, consisting of a pindaric ode, For the Queen's Birth-Day, 1786; and poetical epistles, On various Moral and Entertaining Subjects; by Mrs. Mary Deverell, Gloucestershir. The second edition.},
  publisher={Bull and Meyler \& },
  address={London},    }