Murat took the old King and Queen under his protection, provided them with a suitable guard, and demanded the liberation of Godoy. Ferdinand, convinced that he could not maintain the throne without the support of Napoleon, sent his younger brother, Don Carlos, to intercede with the Emperor in his favor. While these scenes were transpiring, Savary, Duke of Rovigo, arrived at Madrid. He assured Ferdinand that it was the Emperor's desire to unite France and Spain in the closest alliance. He proposed that Ferdinand should visit Napoleon, that in a personal interview they might the better mutually understand each other. The counsellors of Ferdinand urged the adoption of this measure, as one which would secure the confidence of the Emperor, and which might induce him to give a princess of his family to Ferdinand. Such was the condition of affairs in April, 1808. The great object of Napoleon was to secure a government in Spain whose treachery he need not fear, and upon whose friendly co-operation he could rely. Charles IV., the weakest of weak men, enslaved by long habit, was the obsequious tool of his stronger-minded wife. The Queen, Caroline, sought, at whatever price, to save her lover Godoy. Ferdinand wished to crush Godoy, his implacable foe. Ferdinand decided to visit the Emperor, and on the 10th of April left Madrid for that purpose. When he reached his frontiers he wrote a very suppliant letter to Napoleon, entreating the recognition of his right to the throne, and pledging his friendship. Napoleon replied that he was ready to recognize the Prince of Asturias as King of Spain if it should appear that Charles IV. had not been compelled to abdicate through fear of his life. By this extraordinary concurrence of circumstances Napoleon became the judge between the father and the son, both of whom had appealed to his decision.