When the King of Castile learnt that King Fernando had died, he and his wife, the queen, wrote immediately to her mother, Queen Leonor, telling her to make people declare their loyalty to Queen Beatriz, as stated in the treaties. Thereupon Queen Leonor commanded all the counts, masters of the Orders and grandees who were present to do so when the news arrived, and they obeyed. Not only did the King and Queen of Castile write to Queen Leonor in those terms, but they also sent messages to the Archdeacon of Seia and many governors of towns in Portugal, asking them to declare for her as she was their queen and sovereign lady. Some of these obeyed straightaway, and others wrote to the queen [Leonor] before sending their reply. When the queen saw their letters, she ordered them to declare loyalty to her daughter, and that in each town they should fly a banner with the undifferenced arms of Portugal, which were those of Queen Beatriz, and that they should ride through the town with the said banner, shouting, ‘Long live our liege lady, Queen Beatriz of Portugal,’ as is customary for the heir to the throne to be acclaimed when a king dies.

Moreover, Queen Leonor ordered the aforementioned governors to write to the King of Castile, saying that they were pleased to declare loyalty to their liege lady, Queen Beatriz, as it was their duty to do, but honouring the period of her regency, as decreed in the treaties. The superscription of the letter to the king should read as follows, ‘To the King of Castile’, and that to the queen, ‘To our liege lady, Queen Beatriz of Portugal and Castile.’

It so happened that one of the principal places where the queen ordered Queen Beatriz's banner to be raised and people to declare for her daughter was the city of Lisbon; and it was decreed by the queen and the nobles who were present that on a particular day they all should go on horseback carrying the banner throughout the city.