Peiresc employed some of the most learned men of his time to collect for him in Italy. Jacques Gaffarel, who had been engaged in similar work for Richelieu, was his principal agent in Rome. At Padua he was so fortunate as to secure the services of the archaeologist Tomasini. But his correspondence shows that the prince of librarians, Gabriel Naude, was at once his agent, his adviser, and his friend; and it is from Naude that we take the words of grief which remain as the scholar's memorial. 'Oh cruel Fate and bitter Death, thrust into the midst of our jollity! Was there ever a man, I pray you, more skilled in history and philology, more ready to assist the student, more endowed with wit and wealth and worth, the equipment of any man who, like Peiresc, is to hold the world of letters at his beck and call.' CHAPTER XV. FRENCH COLLECTORS--NAUDE TO RENOUARD. Gabriel Naude was a Doctor of Medicine, and held an appointment at one time as physician in ordinary to Louis XIII. But even as a student he manifested that passion for books which furnished the real occupation of his life. Before taking his degree at Padua he was librarian to Henri de Mesmes, and afterwards to Cardinal Bagni at Rome. On his patron's death he was placed in charge of the great library which Cardinal Barberini was establishing in his palace in the Piazza of the Quattro Fontane. Some part of his time was spent in collecting books for Cardinal Richelieu, who offered Naude the charge of his library in 1642; but, the Cardinal having died in that year, Naude transferred his services to Mazarin. He inspired his employer with the desire of emulating the magnificence of Barberini and the patriotic generosity of Borromeo; and the librarian's keen scent for books and minute knowledge of their values were thenceforth utilised in the work of creating the _Bibliotheque Mazarine_.