"Eventually he abandoned its use, and took kindly even to such methods as the actual cautery, red-hot knives for amputations and the like, that would sear the surfaces of tissues, and the bloodvessels, and not give rise to secondary hæmorrhage. A little later, however, someone not familiar with the secondary risks would reinvent the ligature. If he were cleanly in his methods, and, above all, if he were doing his work in a new hospital, the ligature worked very well for a while. If not, it soon fell into innocuous desuetude again. In any case, it was only a question of time until it would be abandoned." There was at least one, and probably a number of English surgeons who were doing excellent work in the latter part of the Middle Ages, but John of Ardern wrote a book which has come down to us, and from him we may judge the character of his contemporaries. He was educated at Montpellier, and practised surgery for a time in France. About the middle of the fourteenth century, according to Pagel, he went back to his native land and settled for some twenty years at Newark in Nottinghamshire; and for nearly thirty years longer, until near the end of the century, practised in London. Ardern's speciality was diseases of the rectum, but he made special studies in the treatment of fistulas everywhere in the body. He was an expert operator, and seems to have had excellent success in this field. He made careful statistics of his cases, and was quite as proud as any modern surgeon of the large numbers that he had operated on, which he gives very exactly. He was the inventor of some new instruments and of a clyster apparatus. We know something also about his fees, and there is no doubt that he obtained quite as good fees in proportion to the value of money as even any specialist of the modern time. Ardern gives many evidences of his power of clinical observation, and incidentally makes it very clear that the eyes of the men of his time were not so held from seeing the things that lay before them as is often assumed. Mr. D'Arcy Power, in the paper on "The Lesser Writings of John Ardern" which he read before the section on the History of Medicine at the Seventeenth International Congress (see Transactions), has quoted a series of paragraphs from Ardern which make it very clear how accurate an observer this fourteenth-century Englishman was. Here, for instance, is his description of epidemic sore throat in his time, probably diphtheria, for the death within five days through strangling would seem to point to this: