Fruits of philosophy, or the private companion of young married people,

First edition published privately and anonymously. Second edition, with additions, Boston, 1833. Many times reprinted. Republished by Charles Bradlaugh and Annie Besant, 1891. Edited, with an introductory notice by Norman E. Himes, and with "medical emendations" by Robert Latou Dickinson (1937). Digital facsimile of the 1891 edition from the Internet Archive at this link.  See Michael Sappol, "Anatomical Performance, Medical Narrative, and Identity in Antebellum America," Bull. Hist. Med., 83 (2009) 460-49, which primarily concerns the life of Knowlton through the examination of his autobiography.