There are 2 titles associated with this firm.

@book{ wphp_7321
  author={Cobbe,Sarah},
  year={1800},
  title={Julia St. Helen; or, the heiress of Ellisborough. A novel: in two volumes. Published by Sarah Cobbe, Relict of the Rev. Richard Chaloner Cobbe, Rector of Bradenham in Buckinghamshire, and Chaplain to the Right Honorable the Earl of Moira.},
  publisher={},
  address={London},    }
@book{ wphp_8785
  author={de Montolieu,Isabelle},
  year={1808},
  title={Christina; or, Memoirs of a German Princess. By the Author of Caroline of Lichtfield. In two volumes.},
  publisher={Henry Colburn [Conduit Street] \& },
  address={London},    }