Between the village system of caring for defectives, and the germ of the colony idea in their recognition of the value of the country or small town as a dwelling-place for those suffering from backwardness of mind or chronic bodily ills that disturb mentality, and the "open-door system" for the insane, as practised at Bedlam and other places, the Middle Ages anticipated some of the best features of what is most modern in our care for mental patients. Their use of severe pain as a corrective for the psychoneuroses, even when they thought of them in connection with diabolic possession, is another striking instance of their very practical way of dealing with these patients in a manner likely to do them most good. We have had to make our own developments in these matters, however, before we could appreciate the true value of what they were doing in the Middle Ages. APPENDIX I Law of the Emperor Frederick II. (1194-1250) regulating the practice of Medicine.[18] "While we are bent on making regulations for the common weal of our loyal subjects we keep ever under our observation the health of the individual. In consideration of the serious damage and the irreparable suffering which may occur as a consequence of the inexperience of physicians, we decree that in future no one who claims the title of physician shall exercise the art of healing or dare to treat the ailing, except such as have beforehand in our University of Salerno passed a public examination under a regular teacher of medicine and been given a certificate, not only by the professor of medicine, but also by one of our civil officials, which declares his trustworthiness of character and sufficiency of knowledge. This document must be presented to us, or in our absence from the kingdom, to the person who remains behind in our stead in the kingdom, and must be followed by the obtaining of a licence to practise medicine either from us or from our representative aforesaid. Violation of this law is to be punished by confiscation of goods and a year in prison for all those who in future dare to practise medicine without such permission from our authority.