In October letters came from Spain describing the rigour with which Valentino was held prisoner. It was even said that at the instigation of Doña Maria Enriquez he was to be tried there for the murder of her husband, the Duke of Gandia, and for that of his brother-in-law, Alfonso of Bisceglia, with the intention of putting him to death for his crimes. Early in 1505 news reached Italy that Valentino’s brother-in-law, Jean d’Albret, King of Navarre, was endeavouring to secure his release. The cardinals who were still loyal to him believed D’Albret would succeed, Caesar’s most determined enemy, the Queen of Spain, having died. It is recorded that while he was confined in the castle of Chinchilla Caesar attempted to kill the warder, Gabriel Guzman. One day Valentino, who was lodged in the high tower, asked for an interview with Don Gabriel, and while they were engaged in conversation the Duke suddenly seized his gaoler and attempted to hurl him from the window. The governor, however, who was more than a match for Caesar in strength, succeeded in throwing him to the floor; whereupon, with the effrontery which never deserted him, the Duke laughed and explained that he had heard that the warder was a man of colossal strength and he wanted to test it for himself, and he had found the stories were not exaggerated. This curious episode undoubtedly was the cause of Caesar’s removal to the more secure fortress of Medina del Campo, in the northern part of Spain, which was both a stronghold and a palace and had been used as a royal residence. It was about this time that Lucretia Borgia began to exert herself to obtain her brother’s freedom--efforts which have been taken as proof of her affection and devotion to him. Requesenz, Caesar’s majordomo, interceded for his release with the King of Spain, who informed him that while he was not responsible for Valentino’s arrest, he would, owing to Gonsalvo’s representations, hold him prisoner, but that, should the charges made against him prove false, he would accede to the cardinals’ wishes.