The first edition of the _Institutio_ was published in March 1536, in Latin. It was shorter and in many ways inferior to the carefully revised editions of 1539 and 1559. In the later editions the arrangement of topics was somewhat altered; but the fundamental doctrine remains unchanged; the author was not a man to publish a treatise on theology without carefully weighing all that had to be said. In 1541, Calvin printed a French edition, which he had translated himself "for the benefit of his countrymen." After finishing his _Institutio_ (the MS. was completed in August 1535, and the printing in March 1536), Calvin, under the assumed name of Charles d'Espeville, set forth on a short visit to Italy with a companion, Louis du Tillet, who called himself Louis de Haulmont. He intended to visit Renée, Duchess of Ferrara, daughter of Louis XII. of France, known for her piety and her inclination to the Reformed faith. He also wished to see something of Italy. After a short sojourn he was returning to Strassburg, with the intention of settling there and devoting himself to a life of quiet study, when he was accidentally compelled to visit Geneva, and his whole plan of life was changed. The story can best be told in his own words. He says in the preface to his _Commentary on the Psalms_: "As the most direct route to Strassburg, to which I then intended to retire, was blocked by the wars, I had resolved to pass quickly by Geneva, without staying longer than a single night in that city.... A person (Louis du Tillet) who has now returned to the Papists discovered me and made me known to others. Upon this Farel, who burned with an extraordinary zeal to advance the Gospel, immediately strained every nerve to detain me. After having learnt that my heart was set upon devoting myself to private studies, for which I wished to keep myself free from other pursuits, and finding that he gained nothing by entreaties, he proceeded to utter an imprecation, that God would curse my retirement and the tranquillity of the studies which I sought, if I should withdraw and refuse assistance when the necessity was so urgent. By this imprecation I was so stricken with terror that I desisted from the journey which I had undertaken." § 5. _Calvin with Farel in Geneva._