Louis was the least interesting of the family, and it is difficult to excuse his absence from France in 1815. After all, the present of a kingdom is not such an unpardonable offence as to separate brothers for ever, and Napoleon seems to have felt deeply the way in which he was treated by a brother to whom he had acted as a father; still ill-health and the natural selfishness of invalids may account for much. While his son Louis Napoleon was flying about making his attempts on France, Louis remained in the Roman Palace of the French Academy, sunk in anxiety about his religious state. He disclaimed his son's proceedings, but this may have been due to the Pope, who sheltered him. Anyhow, it is strange to mark the difference between the father and his two sons who came of age, and who took to revolution so kindly.

In 1846 Louis was ill at Leghorn when his son escaped from Ham, where he had been imprisoned after his Boulogne attempt. Passports were refused to the son to go from Italy to his father, and Louis died alone on the 25th of July 1846. He was buried at Santa Croce, Florence, but the body was afterwards removed to the village church of St. Leu Taverny, rebuilt by his son Napoleon III.

Jerome, the youngest of the whole family, the "middy," as Napoleon liked to call him, had been placed in the navy, in which profession he passed as having distinguished himself, after leaving his admiral in rather a peculiar manner, by attacking an English convoy, and eventually escaping the English by running into the port of Concarneau, believed to be inaccessible. At that time it was an event for a French man-of-war to reach home.

Jerome had incurred the anger of Napoleon by marrying a beautiful young lady of Baltimore, a Mica Paterson, but, more obedient than Lucien, he submitted to have this marriage annulled by his all-powerful brother, and in reward he received the brand-new Kingdom of Westphalia, and the hand of a daughter of the King of Wartemberg, "the cleverest King in Europe," according to Napoleon. Jerome is said to have ruled rather more as a Heliogabalus than a Solomon, but the new Kingdom had the advantage of starting with good administrators, and with the example of "the Code."

In 1812 Jerome was given the command of the right wing of the Grand Army in its advance against Russia, but he did not fulfil the expectations of his brother, and Davoust took the command instead. Every king feels himself a born general: whatever else they cannot do, war is an art which comes with the crown, and Jerome, unwilling to serve under a mere Marshal, withdrew in disgust. In 1813 he had the good feeling and the good sense to refuse the treacherous offer of the Allies to allow him to retain his kingdom if he joined them against his brother, a snare his sister Caroline fell into at Naples.

On the downfall of Napoleon, Jerome, as the Count of Gratz, went to Switzerland, and then to Gratz and Trieste.

His wife, the ex-Queen Catherine, fell into the hands of Maubreuil, the officer sent on a mysterious mission, believed to be intended for the murder of Napoleon, but which only resulted in the robbery of the Queen's jewels and of some 80,000 francs. The jewels were for the most part recovered, being fished up from the bed of the Seine, but not the cash.

In 1815 Jerome joined his brother, and appeared at the Champ de Mai. A true Bonaparte, his vanity was much hurt, however, by having—he, a real king—to sit on the back seat of the carriage, while his elder brother Lucien; a mere Roman-prince, occupied a seat of honour by the side of Napoleon. In the Waterloo campaign he was given the 6th division, forming part of Reille's corps, General Guilleminot being sent with him to prevent any of the awkwardnesses of 1812. His division was engaged with the Prussians on the 15th of June, and at Quatre Bras he was severely wounded. At Waterloo his division formed the extreme left of the French infantry, opposite Hougomont, and was engaged in the struggle for that post. Whatever his failings may have been, he is acknowledged to have fought gallantly. After the battle he was given the command of the army by his brother, and was told to cover the retreat to Laon, which he reached on the 21st of June, with 18,000 infantry, 3000 cavalry and two batteries which he had rallied. This, be it observed, is a larger force than Ney told the Chambers even Grouchy (none of whose men are included) could have, and Jerome's strength had swollen to 25,000 infantry and 6000 cavalry when he handed over the army to Soult at Laon. Napoleon had intended to leave Jerome with the command of the army, but he eventually took him to Paris.

When Napoleon left the country Jerome was assured by the ambassador of Wurtemberg that he would find a refuge in the dominions of his father-in-law; but when he arrived there he was informed that if he did not wish to be, according to the original intentions of the Allies, handed over to the Prussians, and separated from his wife, he must sign an engagement to remain in Wurtemberg under strict surveillance. He was then imprisoned at Guppingen, and afterwards at Ellwangen, where he was not even allowed to write or receive letters except through the captain of the chateau.

Part of Jerome's troubles came from the conduct of his wife Catherine, who had the idea that, as she had been given in marriage by her father to Jerome, as she had lived for seven years as his wife, and as she had borne a child to him, she was really his wife, and bound to remain with him in his misfortunes! The royal family of Wurtemberg, however, following the illustrious example of that of Austria, looked on her past life as a mere state of concubinage, useful to the family, and to be respected while her husband could retain his kingdom, but which should end the moment there was nothing more to be gained from Napoleon or his brother. It was all proper and decorous to retain the title of King of Wurtemberg, which the former Duke and then Elector had owed to the exile of St. Helena, but King Frederick, and still less his son William, who succeeded him in 1816, could not comprehend Catherine's clinging to her husband when he had lost his kingdom. "I was a Queen; I am still a wife and mother," wrote the Princess to her disgusted father. Another complaint against this extraordinary Princess was that she actually saw Las Cases on his return from St. Helena, and thus obtained news of the exile.