Allan Ingram 
The Madhouse of Language [PDF ebook] 
Writing and Reading Madness in the Eighteenth Century

Language has always been used as a measure of social, ideological, and psychological contexts for the exploration of madness. The Madhouse of Language considers the relations between madness and language from the late seventeenth to early nineteenth centuries, focusing on the close analysis of both medical records and texts by mad writers. It presents a highly original account of the linguistic relations between madness and sanity, of the appropriation by sane writers of the forms of English, and of attempts by mad patients to gain access to the expressive potential of language.