There are 3 titles associated with this firm.

@book{ wphp_14895
  author={Manley,Delarivier},
  year={1698},
  title={The lost lover; or, the jealous husband: a comedy. As it is acted at the Theatre Royal by His Majesty’s Servants. Written by Mrs. Manley.},
  publisher={Francis Saunders \& Richard Bentley \& James Knapton \& Richard Wellington I},
  address={London},    }
@book{ wphp_23693
  author={Pix,Mary},
  year={1701},
  title={The double distress. A tragedy. As it is acted at the Theatre-Royal in Little Lincolns-Inn-Fields. By His Majesty's servants. Written by Mrs. M. Pix.},
  publisher={Richard Wellington I},
  address={London},    }
@book{ wphp_22858
  author={Pix,Mary},
  year={1705},
  title={The conquest of Spain: a tragedy. As it is Acted by Her Majesty's Servants at the Queen's Theatre In the Hay-Market.},
  publisher={Richard Wellington I},
  address={London},    }