I write as a physician, with a physician's sense of responsibility, and not as a proselyte. Nor do I write as a scholar, otherwise I would wisely barricade myself behind the safe walls of my specialism and not, on account of my inadequate knowledge of history, expose myself to critical attack and damage my scientific reputation. So far as my capacities allow, restricted as they are by old age and illness, I have made every effort to document my material as reliably as possible and to ass