HENRI D'ORLEANS, duke of Aumale. The military... Lot 4

HENRI D'ORLEANS, duke of Aumale]. The military institutions of France. Louvois - Carnot - Saint-Cyr. Paris, Michel Lévy Frères, 1867. In-8° of 193 pp. Half vellum, spine painted with the symbols of the royalty, the revolution and the Empire, red cloth boards, arms on the upper board, red head, cover preserved. Very rare first edition, with a letter from the author. With the arms of the Carnot family, with a beautiful autograph note by Colonel Carnot concerning the Duc d'Aumale, Lazare Carnot and the royal family: "I went, on Sunday, March 28, 1897, to Chatilly, and I reminded the Duc d'Aumale of his study on C[arnot]. My grandfather esteemed him infinitely," he replied, "and I still have his copy of the Eloge de Vauban, which he appreciated, since 1784, and which he had not forgotten in 1815. The Duc d'Aumale having died on May 7, 1897, he is probably referring to his father King Louis-Philippe, who went into exile in England in 1815, and not to his "grandfather", Philippe Egalité, who died on the scaffold in 1793. Unless, which is less likely, it is his maternal grandfather, the king of the Two Sicilies Ferdinand I, who returned to the throne in 1815...