The Allies approach Paris—Maria Louisa retires to Blois—Marmont and Mortier occupy the Heights of Montmartre—They are defeated—King Joseph escapes—Marmont capitulates—the Allies enter Paris—Napoleon at Fontainebleau—His abdication.Napoleon's Journey to Frejus—Voyage to Elba—his conduct and occupations there—Discontents in France—Return of Prisoners of War—Jealousy of the Army—Union of the Jacobins and Buonapartists—Their intrigues—Napoleon escapes from Elba.CHAPTER XXXVII