With the stimulus of necessity upon him, for he was poor, and the excitement of vanity, with which he was largely endowed, as he could not live on the learning he imbibed from his teachers, Servetus by-and-by appeared before the world as a teacher in his turn. Having by diligence and superior natural capacity, in a singularly short space of time, achieved the degrees of M.A. and M.D., which were required before he could present himself either as Professor or Physician within the domain of the University of Paris, Servetus now came forward as a Lecturer on the Geography of Ptolemy and the science of Astrology--a term which then included the true doctrine of the heavenly bodies as well as the false doctrine of their presumed influence on the life of man and the current of events in the world. In this bold step we have another glimpse of the self-reliant, and it may be, somewhat presumptuous, character of the man; for even as the emancipated novice of the monk’s school and Saragossan professors, when little more than of age, showed himself as Theologian in the ‘De Erroribus Trinitatis,’ so did the newly becapped Magister Artium now come forward as Lecturer on Geography and Astrology, and the scarce fledged doctor in physic, as a teacher of his fellows and the world at large, in the art and mystery of treating Disease. The course of Lectures on Geography and Astrology was a happy thought, and proved highly successful. It was delivered to a large and distinguished audience, and besides supplying the professor with funds for all his wants, became a means of introducing him to friends, influential for good on his future life. Amongst the number of his auditors there was a young ecclesiastic, a scholar and man of talent, Pierre Paumier, who after employment in various offices of trust by his king, Francis the First, was transferred to a position of no less dignity and emolument than that of Archbishop of Vienne in Dauphiny. Under the auspices of the Archbishop, and as we believe on his invitation, it was that Servetus found a final resting place by his side. Fresh from editing Ptolemy, with the old stores of classic lore he had at command, and of anecdote and general information he had amassed in reading up for his editorial duties, aided by the natural fluency with which we venture to credit him, it is easy to imagine how interesting these Lectures must have been in days when the world was eager for information on the discoveries of the great voyagers and travellers of the age, and when books were still both scarce and costly, and little read by the many.