1453. Attacked by malaria fever 104 " July 26. His letter to the Priors of Siena 104 " Uninteresting conclusion of the war 105 " Fall of the Greek empire, and taking of May 29. Constantinople 106 1454. Efforts of Nicholas V. for a general league against the Turks 107 " April 9. The peace of Lodi 107 1455. Mar. 24. The death and character of Nicholas V. 107 1454. Federigo's friendly visit to the King of Naples 108 1455. The King ratifies the league with an unfortunate Jan. 26. reservation 109 1457. Federigo takes measures for humbling Sigismondo 109 " April. Visits Florence, Bologna, Milan, and Mantua 109 " His fruitless interview with Sigismondo at Modena 110 " He goes to Naples for assistance; many intrigues June. there 110 " Death of his Countess Gentile 111 " Nov. 7. Asks a mortar-founder from Siena 111 " He attacks Sigismondo 112 1458. May 2. His despatch to the Priors of Siena 112 " July 1. Death of Alfonso of Naples 113 " Aug. 6. Death of Calixtus III. 113 " Ambitious intrigues of Giacomo Piccinino, who seizes on part of the ecclesiastical territory 114 " Federigo continued as Captain-general by Ferdinand of Naples 115 " New disputes for the crown of Naples 115 1459. May 27. Pius II. summons a European congress at Mantua 116 " His mediation between Malatesta and the Count of Urbino 116 " June 21. His letter to Federigo 117 " His award in favour of Federigo 119 CHAPTER VII Federigo's domestic life 120 1454. His sons Buonconte and Antonio legitimated 120 1458. Oct. Buonconte dies at Naples of plague 120 " Death of another son, Bernardino 120 1459. Count Federigo's marriage to Battista Sforza proposed 121 " Errors of Sismondi regarding her (note) 121 " Her education and accomplishments 121