Note *54 — Chapter III

Oddantonio seems to have strongly disliked Federigo, his father's natural son. He would not suffer him to live at Urbino. The Duke was to have married Cecilia Gonzaga, but preferred at the last moment Isotta d'Este, thinking she would be more likely to give him an heir and so exclude Federigo. See Tarducci, Cecilia Gonzaga ed Oddantonio di Montefeltro (Mantova, 1897). Violante, Federigo's half-sister, renounced her part of the heritage of her father in documents preserved in Arch. Centrale di Firenze (Carte d'Urbino, Cartapecore Laiche, Nos. 180 and 209), printed by Madiai in Le Marche, vol. III., pp. 125-32.