ROGER, ROLAND, AND THE FOUR MASTERS Ruggero, or Rogero, who is also known as Rogerio and Rogerus with the adjective Parmensis, or Salernitanus, of Parma or of Salerno, and often in German and English history simply as Roger, lived at the end of the twelfth or the beginning of the thirteenth century and probably wrote his text-book about 1180. This text-book was, according to tradition, originally drafted for his lessons in surgery at Salerno. It attracted much attention and after being commented on by his pupil Rolando, the work of both of them being subsequently annotated by the Four Masters, this combined work became the basis of modern surgery. Roger was probably born either in Palermo or Parma. There are traditions of his having taught for a while at Paris and at the University of Montpellier, though these are not substantiated. His book was printed at Venice in 1546, and has been lately reprinted by De Renzi in his "Collectio Salernitana." Roland was a pupil of Roger's, and the two names that often occur in medieval romance became associated in a great historic reality as a consequence of Roland's commentary on his master's work, which was a favorite text-book in surgery for a good while in the thirteenth century at Salerno. Some space will be given to the consideration of their surgical teaching after a few words with regard to some disciples who made a second commentary, adding to the value of the original work. This is the well-known commentary of the Four Masters, a text-book of surgery written somewhat in the way that we now make text-books in various departments of medicine, that is, by asking men who have made specialties of certain subjects to write on that subject and then bind them all together in a single volume. It represents but another striking reminder that most of our methods are old, not new as we are likely to imagine them. The Four Masters took the works of Roger and Rolando, acknowledged their indebtedness much more completely than do our modern writers on all occasions, I fear, and added their commentaries.