His larger experience and intercourse with Champier must have shown Servetus that medicine was a more assured means of earning a subsistence than theology, and opened up a far wider field to his ambition than continued service with the typographers. Without utterly neglecting older studies, therefore, he now gave his chief attention to the great and useful art and science of medicine; and we shall find as we proceed that the lessons of such teachers as Joannes Guinterus (Jo. Winter of Andernach), Jacobus Sylvius (J. du Bois), Joannes Fernelius, and others of name and fame in their day, found congenial soil in the receptive mind of the student. Servetus, indeed, would seem immediately to have made his presence felt in the medical school of Paris; he was at once more than a listener to the prelections of its professors. Associated with no less distinguished an individual than Andrea Vesalius, he was one of Winter of Andernach’s two prosectors, and prepared the subject for each day’s demonstration. And let not the conjunction of talent that meets us here be overlooked. Vesalius, repudiating the authority of Galen, became the restorer--the _Creator_ of Modern Anatomy. Servetus, breaking with scholasticism in theology, and freeing himself from the shackles of Greeks and Arabians in practical medicine, inaugurated Rational Physiology when he proclaimed the course of the blood from the right to the left side of the heart through the lungs. Working together as friends and fellow students for the Professor of Anatomy, Vesalius and Servetus, through diversity of mental constitution, yet saw things diversely. Vesalius, the observer, abiding by the _concrete_, described with rare felicity and truthfulness what he witnessed; Servetus, gifted with genius, aspiring to the _ideal_ and inferring consequences, deduced the pulmonary circulation from the structure of the heart and lungs! Nor were the two men associates only in their studies; they were fellows also in the untoward fate that befel them both in after life; for both may be said to have fallen victims to their zeal. Somewhat precipitate, we may presume, in his eagerness for information, the heart of a young nobleman who had died under his care and whose body Vesalius was inspecting, was either seen to palpitate, or was thought to have palpitated, when touched by the knife of the anatomist. Accused forthwith of murder, it was only by the interference of Philip II. of Spain, whose physician Vesalius was, that a formal trial for manslaughter was commuted for a pilgrimage to Jerusalem with confession and absolution at the shrine of the Holy Sepulchre. The penance was undergone, but the pilgrim, homeward bound, suffered shipwreck on the island of Crete, and perished miserably there. Servetus again, as we shall see, in his eagerness to proclaim what he believed to be the truth, and given no chance for his life, had to abide the still more cruel death of the faggot and stake.