In 1820 his eldest brother, the Duc d'Orléans, inaugurated at Chantilly the races which now rank as the French Derby, and which have continued every year up to the present day. In connection with these races the Duc d'Orléans, with the help of General Peel--a brother of Sir Robert Peel--successfully undertook to breed English racehorses in France; and Chantilly thus became a racing centre to which the _élite_ of French society thronged every year to attend a "Meeting" which speedily became one of the most famous in the annals of Sport. Residential accommodation was then very restricted, for only the Petit Château and the Château d'Enghien were available, the Grand Château not having yet been rebuilt. The theatre where Molière, Racine, and Corneille produced their plays had also vanished; a substitute was therefore improvised for these occasions by the Comédie Française on the site of the present Library. But Orléans Princes in those days had not so much leisure for mere recreation as had their predecessors. In that same year the Duc d'Orléans started for Algiers, taking with him the Duc d'Aumale, then only eighteen. In spite of his youth on the premature death of his elder brother he was entrusted with the command at Medea, where he distinguished himself greatly, and became so beloved that the tiny little Arab house which was his temporary residence there is still preserved by a grateful nation. Engaging in a variety of operations in Algeria, he brought this campaign to a brilliant ending in 1844 by a victory over Abdul Kader; by which he succeeded in capturing the concealed camp "La Smalah" where this chieftain and his staff had been residing. This victory was principally due to the young Duke's great energy and powers of endurance. In the Musée Condé there is a room called "La Smalah," where we may still see numerous paintings and sketches by Bellange and Horace Vernet illustrating this victorious African campaign. On the Duke's return from Algiers a marriage was arranged between him and Caroline Auguste de Bourbon, daughter of the Prince of Salerno and the Archduchess Marie Clementine, sister to Napoleon I's second wife, Marie Louise of Austria. The nuptials were celebrated at Naples, and a few days later the young pair left for France, where they were impatiently expected by Queen Amélie, who was overjoyed to welcome one of her own relatives as her son's bride.