Note 311 — BOOK IV.
William Julius Mickle translation
When Henry IV. of Castile died, he declared that the infanta Joanna, was his heiress, in preference to his sister, Donna Isabella, married to Don Ferdinand, son to the King of Arragon. In hopes to attain the kingdom of Castile, Don Alonzo, king of Portugal, obtained a dispensation from the pope to marry his niece, Donna Joanna. After a bloody war, the ambitious views of Alonzo and his courtiers were defeated.