There are 2 titles associated with this person.

@book{ wphp_6463
  author={Pratt,Mary},
  year={1789},
  title={A list of a few cures performed by Mr. and Mrs. de Loutherbourg, of Hammersmith Terrace, without medicine. By a lover of the Lamb of God. M. P. Most respectfully dedicated to His Grace the Archbishop of Canterbury.},
  publisher={},
  address={London},    }
@book{ wphp_6204
  author={Pratt,Mary},
  year={1789},
  title={A list of a few cures performed by Mr. and Mrs. de Loutherbourg, of Hammersmith Terrace, without medicine. By a lover of the Lamb of God. M. P. Most respectfully dedicated to His Grace the Archbishop of Canterbury.},
  publisher={},
  address={London},    }