Return of Prince Charles and revision of the Treaty of Briones, 1382-1383. Prince Charles was physically and morally resentful from 1379 onwards, when he was barely 47 years old. The disaster at Briones was something like the last snub that a constantly adverse fortune would deal him. Yanguas expresses with nineteenth-century simplicity what must have been a tremendous psychic trauma: it seems that the misfortune that always accompanied all his undertakings was greater than the violence of his character and that even his physical organisation participated in the clash of misfortunes with the vehemence of his desire to subordinate everything to his will. He fell ill, therefore, quite seriously. Meanwhile, Prince Charles was freed and the new king of France, Charles VI, returned to him the property confiscated by John the Good. In December 1382 he was already with his father - probably recovered - who displayed on the day of his son's arrival an iron chapel decorated with pearls and a fleur-de-lis with stones (Comptos). On his trip to Castile, Prince Charles provided another joy for his father: he achieved the rectification of the Treaty of Briones through the so-called Treaty of El Espinal (19 October 1383). Through it it was agreed that John I of Castile would abandon the castles he had in pledge except Tudela and San Vicente, that in these the Navarrese could appoint the wardens, that the prince would personally help the Castilian with men in his war for the succession of Portugal, and other details. Months later Prince Charles left for Portugal (January 1384).