The Concept of Anxiety
All of Kierkegaard's books have either a preface, dedication, or prayer at the beginning. This book includes a lengthy introduction. "The Concept of Anxiety" was published on exactly the same date as "Prefaces", June 17, 1844. Both books deal with Hegel’s idea of mediation. Mediation is a common thread throughout Kierkegaard’s works. His work up to this point was to show that faith was being mediated by knowledge. Here he takes up the questions of sin and guilt.
Joseph Mason Cox
Joseph Cox published a book in 1804 which described his experiences in treating mental patients as both a madhouse keeper and a psychiatric consultant. The title page of the book reads "Practical Observations on Insanity in which some suggestions are offered towards an Improved Mode of Treating Diseases of the Mind, and Some Rules Proposed which it is hoped may lead to a more Humane and successful Method of Cure. To which are subjoined, Remarks on Medical Jurisprudence as connected with Disease Intellect". The book had two subsequent editions in 1811 and 1813, and was published in France, Germany, and the United States.