The most important of all Petrarch’s Latin works is his collection of Epistles, partly formed by himself in his lifetime, and greatly enriched by the diligence of recent editors, especially Fracassetti. These are not only of high interest from the portrait they convey of the man himself, equally as an individual and as the ideal type of the man of letters, but form a perpetual commentary on the manners and customs of his age. Many, though composed by Petrarch, are written in the names of sovereigns or public bodies; others are letters of warm encouragement or warmer remonstrance to popes, emperors, and others who then seemed, but only seemed, to have the world’s destinies in their hands. In all his correspondence with the great, Petrarch, like Dante, appears as the idealist, inspired by the remembrance of antiquity, and urging upon the rulers of the day a more exalted course of action than suited their dispositions, or, it must be admitted, was compatible with the circumstances of the time. They on their parts seem to have appreciated the honour of being lectured by such a man, and to have permitted him to say what he pleased, satisfied that he could exert no practical influence upon the course of politics. Printing and the liberty of the press have now made the humblest newspaper scribe more potent than the first man of letters of the fourteenth century. Some of Petrarch’s epistles are of unique interest, such as the description of his ascent of Mount Ventoux, of the great tempest at Naples, and of the apparition of the ghost of the Bishop of Lombès, the first circumstantial narrative of the kind, and perhaps to this day the best authenticated. Petrarch’s encouragement of classical study is not the least among his titles to fame. He was the Erasmus of his age in so far as the rudimentary condition of criticism allowed, and, in so far as his means permitted, its Mæcenas. He discovered Cicero’s epistles to Atticus, and, by his own statement, which there seems no sufficient reason for rejecting, had at one time the lost treatise _De Gloria_ in his hands. He yearned towards Homer and Plato, whom he could not read in the original, but perused in translations. The fullest information respecting his literary tastes, the extent of his library and his knowledge of the classics, his borrowings and loans of manuscripts, his copyists and his bindings, will be found in the excellent monograph of Pierre de Nolhac, _Pétrarque et l’Humanisme_ (Paris, 1892). Many manuscripts known to have belonged to him still exist, chiefly in French public libraries. The story of the destruction of his books by the neglect of the Venetians is groundless; they ought to have been made over to the Republic after his death, but they never reached Venice. The Aldine Italic type is said to have been modelled after Petrarch’s handwriting, and the first book in which it was used was an edition of the author whom he principally annotated, Virgil.