There are 3 titles associated with this person.

Sykes, Henrietta. Margiana; or, Widdrington Tower. A Tale of the Fifteenth Century. In Five Volumes. London: Minerva Press, Lane, Newman, and Co., 1808.
Sykes, Henrietta. Sir William Dorien. A Domestic Story. In Three Volumes. By the author of Margiana; or, Widdrington Tower. London: Minerva Press, A. K. Newman and Co., 1812.