The newly-married Queen of Portugal now became the heiress to the crowns of Aragon and Castile, but she died a year later and shortly afterwards her infant son. The succession therefore passed to the younger sister, Juana; and Philip the Fair, the heir of the House of Austria and already through his mother the ruler of the rich Burgundian domain, became through his wife the prospective sovereign of the Spanish kingdoms of Ferdinand and Isabel. Fortune seemed to have reserved all her smiles for the young prince, when on February 24, 1500, a son was born to him at Ghent, who received the name Charles. But dark days were soon to follow. Philip was pleasure-loving and dissolute, and he showed little affection for his wife, who had already begun to exhibit symptoms of that weakness of mind which was before long to develop into insanity. However in 1501, they journeyed together to Spain, in order to secure Juana's rights to the Castilian succession and also to that of Aragon should King Ferdinand die without an heir-male. In November, 1504, Isabel the Catholic had died; and Philip and his consort at once assumed the titles of King and Queen of Castile, in spite of the opposition of Ferdinand, who claimed the right of regency during his life-time. Both parties were anxious to obtain the support of Henry VII. Already since the accession of Philip the commercial relations between England and the Netherlands had been placed on what proved to be a permanently friendly basis by the treaty known as the _Magnus Intercursus_ of 1496. Flanders and Brabant were dependent upon the supply of English wool for their staple industries, Holland and Zeeland for that freedom of fishery on which a large part of their population was employed and subsisted. In reprisals for the support formerly given by the Burgundian government to the house of York, Henry had forbidden the exportation of wool and of cloth to the Netherlands, had removed the staple from Bruges to Calais, and had withdrawn the fishing rights enjoyed by the Hollanders since the reign of Edward I. But this state of commercial war was ruinous to both countries; and, on condition that Philip henceforth undertook not to allow any enemies of the English government to reside in his dominions, a good understanding was reached, and the _Magnus Intercursus_, which re-established something like freedom of trade between the countries, was duly signed in February, 1496. The treaty was solemnly renewed in 1501, but shortly afterwards fresh difficulties arose concerning Yorkist refugees, and a stoppage of trade was once more threatened. At this juncture a storm drove Philip and Juana, who had set sail in January, 1506, for Spain, to take refuge in an English harbour. For three months they were hospitably entertained by Henry, but he did not fail to take advantage of the situation to negotiate three treaties with his unwilling guest: (1) a treaty of alliance, (2) a treaty of marriage with Philip's sister, the