In the same year appeared the completed form of his Manual of Medical Jurisprudence, being an Analysis of a Course of Lectures on Forensic Medicine.
In 1831 also appeared the third edition, of Ryan's Manual of Midwifery … comprising a new Nomenclature of Obstetric Medicine, with a concise Account of the Symptoms and Treatment of the most important Diseases of Women and Children.
[2] In editing from 1832 to 1838 the original London Medical and Surgical Journal, Ryan had some assistance from James Fernandez Clarke.
[3] His later publications included The Philosophy of Marriage in its Social, Moral, and Physical Relations; with an Account of the Diseases of the Genito-Urinary Organs and the Physiology of Generation in the Vegetable and Animal Kingdom, 1837; this formed part of a course of obstetric lectures delivered at the North London School of Medicine.
He translated and added to Le Nouveau Formulaire pratique des Hôpitaux by Henri Milne-Edwards and Pierre Vavasseur.