His Treatise "On Solitary Life" 101 1353. He crosses the Alps, and visits Milan 101 1354. Is invited by Charles, Emperor of Germany, to visit Mantua 102 He exhorts Charles to deliver Italy 102 1355. Petrarch at Milan 103 He is sent on two Missions--one to Venice, the other to Prague 103 1360. Invasion of France by the English 103 Petrarch sent to congratulate King John on his Return from Imprisonment 103 He returns to Italy 104 His Letter to Settimo 104 1361. Italy again visited by the Plague 105 Death of Petrarch's Son 105 Marriage of Francesco, Daughter of Petrarch 106 The Poetry of Dante and Petrarch compared 106 "The Triumph of Death" 107 Petrarch's Description of Laura's Death 107 1363. Boccaccio, his Attachment for Petrarch 110 Leonzio Pilato's Death 110 1367. Petrarch's Letter to Pope Urban V. 110 His Reply 110 1369. Petrarch suffers from Fever 110 1372. (January.) His Letter to a Friend who had asked him, "how he was" 112 1374. His Opinion of the Decameron of Boccaccio 113 His Death 114 His Will 114 BOCCACCIO.