There are 2 titles associated with this firm.

@book{ wphp_5540
  author={Bromley,Eliza Nugent},
  year={1784},
  title={Laura and Augustus, an authentic story; in a series of letters, by a young lady. In three volumes.},
  publisher={William Cass},
  address={London},    }
@book{ wphp_8095
  author={Cartwright,Mrs. H.},
  year={1785},
  title={The duped guardian: or, the amant malade. A novel. In a series of letters. By Mrs Cartwright. In two volumes.},
  publisher={William Cass},
  address={London},    }