From Esslingen, Christina had intended to go to Heidelberg, on a visit to her sister, but the unsettled state of affairs made her presence necessary at home, and she hurried on to Nancy. The French were once more busy with preparations for war, and grew every day more insolent in their language. Even the Emperor's old ally, the Constable Montmorency, who had been recalled to Court by Henry II., joined the war party, and seemed to be as violent as the Guises. At the same time fresh trouble was brewing in Germany. The Interim had proved very unpopular. Magdeburg refused to accept the new edict, and Maurice of Saxony, who was sent against the city, carried on the siege in so half-hearted a manner that doubts of his loyalty were felt, while the Marquis Albert kept away from Court and sulked, like Achilles of old, in his tent. But the worst of all the Emperor's troubles were those which had arisen in his own family. Granvelle confessed to Paget at Brussels that it had not been easy for Charles to obtain the recognition of his son as his successor in Flanders, and that he foresaw this would be a far harder matter in Germany. From the first, Philip's haughty manners and Spanish reserve were bitterly resented by the Princes of the Empire, and Charles realized with dismay how difficult it would be to obtain their consent to the adoption of his son as coadjutor of the King of the Romans, and his ultimate successor on the imperial throne. He had first of all to reckon with Ferdinand. This monarch had always been on the most affectionate terms with his brother, but was naturally indignant when rumours reached him, through the Marquis Albert's servants, that the Emperor intended to make Philip King of the Romans in his place. In vain his sister Mary assured him that this idea had never been entertained. His resentment was kindled, and he and King Maximilian were prepared to resist stoutly any infringement of their rights.[428]