The Therapeutics of John the Physician is a medical handbook from the thirteenth century, holding important new evidence on medicine as craft. Of particular interest is a vernacular version of the text, which also contains a commentary. Here, an unknown reviser vividly describes cases and medical procedures, a type of knowledge rarely encountered in scholarly texts. In the present volume, the Therapeutics is published for the first time, along with a translation and an introduction to the topic. Apart from insights into medical history, the text also yields a large quantity of...