On the Nature of Thought / or, The act of thinking and its connexion with a perspicuous sentence

Sound Mind / or, Contributions to the natural history and physiology / of the human intellect

Observations on Madness and Melancholy

A Letter to the Right Honorable the Lord Chancellor, on the Nature and Interpretation of Unsoundness of Mind, and Imbecility of Intellect

Sound Mind

A Letter to the Right Honorable the Lord Chancellor, on the Nature and Interpretation of Unsoundness of Mind, and Imbecility of Intellect