It was whilst engaged in the revision of such works as the Ptolemy and others on the natural sciences, anatomy, medicine, pharmacy, &c., in the service of the Trechsels, that Servetus may be said to have entered on the second, if it were not rather the third, stage of his mental development. The typographer’s reading-room had in truth proved the means of his continued education; each new volume he read and corrected being found a teacher not less influential than the Professor from his chair. The Convent school, Toulouse, and his engagement with Quintana had borne fruit of the kind we discover in the book on Trinitarian error; it was the reading-room of the printers of Lyons that brought him back from the empyrean of metaphysics to the earth, and put him in the way of becoming the geographer, astrologian, biblical critic, physiologist and physician we are made familiar with in his subsequent life and writings. Among the learned works that flowed in a sort of ceaseless stream from the presses of the Trechsels during Servetus’s tenure of his office as reader with them, were several from the fertile pen of Doctor Symphorien Champier, or, when he latinised his name, Campeggius, a man of large and liberal culture, of a truly noble nature, an admirer of learning and a patron of the learned; possessed moreover of that restless vanity which made him feel it as much a matter of necessity to live in the eye of the world as to breathe; the effect of which was that he exerted the widest and most beneficent influence among his fellow men. Indefatigable in his proper calling, there was yet nothing which interested the citizens of Lyons that did not interest him. Fearless in bringing help on the battle-field, to which he accompanied his chief the Duke of Lorraine, he was no less ready to brave pestilence in the city, and was as often to be seen in the hovels of the poor as in the palaces of the great and wealthy--_inopibus et infortunatis æque indiscriminatimque succurris opitularisve_, says his biographer--a true physician, a great and good man.[39]