CHAPTER IV.

ALLIANCES OF THE ROYAL FAMILY.--DEATH OF PRINCE JOHN AND PRINCESS ISABELLA. ROYAL FAMILY OF CASTILE JOANNA BELTRANEJA MARRIAGE OF THE PRINCESS ISABELLA DEATH OF HER HUSBAND ALLIANCES WITH THE HOUSE OF AUSTRIA AND THAT OF ENGLAND JOANNA EMBARKS THE QUEEN'S ANXIETY MARGARET OF AUSTRIA RETURNS IN THE FLEET MARRIAGE OF JOHN AND MARGARET SECOND MARRIAGE OF PRINCESS ISABELLA SUDDEN ILLNESS OF PRINCE JOHN HIS DEATH HIS AMIABLE CHARACTER THE KING AND QUEEN OF PORTUGAL VISIT SPAIN OBJECTIONS TO THEIR RECOGNITION ISABELLA DISPLEASED HER DAUGHTER'S DEATH ITS EFFECTS ON ISABELLA PRINCE MIGUEL'S RECOGNITION