There are 3 titles associated with this person.

@book{ wphp_406
  author={Sykes,Henrietta},
  year={1808},
  title={Margiana; or, Widdrington Tower. A Tale of the Fifteenth Century. In Five Volumes.},
  publisher={Minerva Press, Lane, Newman, and Co.},
  address={London},    }
@book{ wphp_964
  author={Sykes,Henrietta},
  year={1812},
  title={Sir William Dorien. A Domestic Story. In Three Volumes. By the author of Margiana; or, Widdrington Tower.},
  publisher={Minerva Press, A. K. Newman and Co.},
  address={London},    }
@book{ wphp_1064
  author={Sykes,Henrietta},
  year={1813},
  title={Stories of the Four Nations, containing Montargis, A French Story; My Aunt Patty, an English Story; Lillias de Lara, A Spanish Story; The Calabrian, An Italian Story. In Five Volumes. By the author of Margiana; Sir William Dorien, &c. &c.},
  publisher={Minerva Press, A. K. Newman and Co.},
  address={London},    }