Shortly after the departure of the Emperor, Petrarch had the satisfaction of hearing, in his own church of St. Ambrosio, the publication of a peace between the Venetians and Genoese. It was concluded at Milan by the mediation of the Visconti, entirely to the advantage of the Genoese, to whom their victory gained in the gulf of Sapienza had given an irresistible superiority. It cost the Venetians two hundred thousand florins. Whilst the treaty of peace was proceeding, Venice witnessed the sad and strange spectacle of Marino Faliero, her venerable Doge, four-score years old, being dragged to a public execution. Some obscurity still hangs over the true history of this affair. Petrarch himself seems to have understood it but imperfectly, though, from his personal acquaintance with Faliero, and his humane indignation at seeing an old man whom he believed to be innocent, hurled from his seat of power, stripped of his ducal robes, and beheaded like the meanest felon, he inveighs against his execution as a public murder, in his letter on the subject to Guido Settimo.
Petrarch, since his establishment at Milan, had thought it his duty to bring thither his son John, that he might watch over his education. John was at this time eighteen years of age, and was studying at Verona.
The September of 1355 was a critical month for our poet. It was then that the tertian ague commonly attacked him, and this year it obliged him to pass a whole month in bed. He was just beginning to be convalescent, when, on the 9th of September, 1355, a friar, from the kingdom of Naples, entered his chamber, and gave him a letter from Barbato di Salmone. This was a great joy to him, and tended to promote the recovery of his health. Their correspondence had been for a long time interrupted by the wars, and the unsafe state of the public roads. This letter was full of enthusiasm and affection, and was addressed to _Francis Petrarch, the king of poets_. The friar had told Barbato that this title was given to Petrarch over all Italy. Our poet in his answer affected to refuse it with displeasure as far beyond his deserts. "There are only two king-poets," he says, "the one in Greece, the other in Italy. The old bard of Mæonia occupies the former kingdom, the shepherd of Mantua is in possession of the latter. As for me, I can only reign in my transalpine solitude and on the banks of the Sorgue."