Cleora, or the Misery attending unsuitable Connections,” in Letters and Essays, Moral, and Miscellaneous, by Mary Hays  (London: T. Knott, 1793), 123-38.

“Josepha, or the Pernicious Effects of Early Indulgence” in Letters and Essays, Moral, and Miscellaneous, by Mary Hays (London: T. Knott, 1793), 139-59.

Fatal Errors; or Poor Mary-Anne. A Tale of the Last Century. In a Series of Letters.  A. J. Valpy, [1819]. [A new critical edition of Fatal Errors, edited by Timothy Whelan and Felicity James, with extensive introductory material related to Lanfear and the Jacobin novel, along with Lanfear's letters, her contributions to Letters and Essays, and selections from Letters to Young Ladies, is now available through Routledge Press (2019), celebrating the 200th anniversary of the novel's original publication.

Letters to Young Ladies on Their Entrance into the World; to which are added Sketches from Real Life. London: J. Robins and Co., 1824; 2nd ed., 1828.