But Servetus was a Physician as well as Geographer and Astrologer, and not the man to hide any light he had under a bushel. He must appear in connection with his profession, as well as in the accessory field of general knowledge, by writing a book upon some properly medical subject, a business which he set about forthwith under the immediate inspiration of all he had learned from Dr. Champier of Lyons, as well as his professors of Paris. CHAPTER XI. THE TREATISE ON SYRUPS AND THEIR USE IN MEDICINE.[45] The medical world in the early part of the sixteenth century was divided into two great hostile camps, respectively designated Galenists, or followers of the Greeks, and Averrhoists, or disciples of the Arabians; the former swearing by Hippocrates and Galen, the latter by Averrhoes and Avicenna. Servetus’s initiator into matters medical, Champier, was a fervent admirer of the Greeks; and his pupil, led by his classical training as well as his master’s example, naturally attached himself to the same school. Here, nevertheless, as ever, he showed the independence of his nature by having open eyes for any truth the Arabian writers might present; so that we find nothing of servility or one-sidedness in what he has to say. The treatise in which Villanovanus came before the public in his new capacity of physician was on the practical use of the class of medicines known in those days by the title of Syrups--sweetened decoctions or infusions of different kinds, still in vogue among the French under the name of Tisanes. These syrups appear to have been one of the bones of contention between the two parties, though neither was perfectly agreed in itself as to the indications for their use or of the principles on which they were to be prescribed. This question does not interest us here, and so we leave it; but we turn to the work of Michael Villanovanus for intimations in its style of the intellectual and moral nature of its author.