That Boccaccio was not at Florence during the pestilence is certain; but we need not therefore doubt the substantial accuracy of his marvellous description of the state of the stricken city, for the course and consequences of the terrible visitation must have been much the same in all parts of Italy, and as to Florence in particular, Boccaccio could have no difficulty in obtaining detailed and abundant information from credible eye-witnesses. The introduction of Fiammetta, who was in all probability at Naples at the time, and in any case was not a Florentine, shews, however, that he is by no means to be taken literally, and renders it extremely probable that the facetious, irrepressible, and privileged Dioneo is no other than himself. At the same time we cannot deem it either impossible, or very unlikely, that in the general relaxation of morale, which the plague brought in its train, refuge from care and fear was sought in the diversions which he describes by some of those who had country-seats to which to withdraw, and whether the "contado" was that of Florence or that of Naples is a matter of no considerable importance. (1) It is probable that Boccaccio's father was one of the victims of the pestilence; for he was dead in 1350, when his son returned to Florence to live thenceforth on the modest patrimony which he inherited. It must have been about this time that he formed an intimacy with Petrarch, which, notwithstanding marked diversity of temperament, character and pursuits, was destined to be broken only by death. Despite his complaints of the malevolence of his critics in the Proem to the Fourth Day of the Decameron, he had no lack of appreciation on the part of his fellow-citizens, and was employed by the Republic on several missions; to Bologna, probably with the view of averting the submission of that city to the Visconti in 1350; to Petrarch at Padua in March 1351, with a letter from the Priors announcing his restitution to citizenship, and inviting him to return to Florence, and assume the rectorship of the newly founded university; to Ludwig of Brandenburg with overtures for an alliance against the Visconti in December of the same year; and in the spring of 1354 to Pope Innocent VI. at Avignon in reference to the approaching visit of the Emperor Charles IV. to Italy. About this time, 1354-5, he threw off, in striking contrast to his earlier works, an invective against women, entitled Laberinto d'Amore, otherwise Corbaccio, a coarse performance occasioned by resentment at what he deemed capricious treatment by a lady to whom he had made advances. To the same period, though the date cannot be precisely fixed, belongs his Life of Dante, a work of but mediocre merit. Somewhat later, it would seem, he began the study of Greek under one Leontius Pilatus, a Calabrian, who possessed some knowledge of that language, and sought to pass himself off as a Greek by birth.