There are 3 titles associated with this firm.

@book{ wphp_12171
  author={Unknown,},
  year={1833},
  title={The Widow's Offering. By Mrs. Kay.},
  publisher={W. Simpkin and R. Marshall \& },
  address={London},    }
@book{ wphp_12622
  author={Unknown,},
  year={1833},
  title={The Widow's Offering. By Mrs. Kay.  Second edition.},
  publisher={W. Simpkin and R. Marshall \& },
  address={London},    }
@book{ wphp_10122
  author={Hardcastle,Eliza Mary},
  year={1834},
  title={Memoir of a Beloved Daughter. By a mother. To which is added the sermon preached on the occasion of her death, by the Rev. H. Robinson.},
  publisher={},
  address={Leeds},    }