There are 2 titles associated with this firm.

@book{ wphp_9547
  author={Thomas,Ann},
  year={1784},
  title={Poems, on Various Subjects, by Mrs. Ann Thomas, of Millbrook, Cornwall, An Officer's Widow of the Royal Navy.},
  publisher={},
  address={Plymouth},    }
@book{ wphp_7088
  author={Webb,Mrs.},
  year={1795},
  title={A letter to His Grace the Duke of Portland, on the late alarming parties in this country, by Mrs. Webb.},
  publisher={Benjamin Robert Haydon \& },
  address={Plymouth},    }