[Ernest MOUCHEZ (1821-1892) admiral and astronomer.] 10 family letters, 1841-1892. Jacques-Barthélémy MOUCHEZ (1783-1849, former wigmaker to the King of Spain, father of the admiral. L.S. partly autograph, Chatou May 20, 1841, to his son Ernest Mouchez in Brest; 3pages in-4, address. Curious letter evoking the debts of the young officer and future admiral. [A naval officer, Ernest Mouchez carried out his first campaign with the naval station of Brazil and La Plata, first on the Fortune (November 12, 1839-October 19, 1840), then on the Églantine (November 23, 1840-May 17, 1841)]. The letter is mainly concerned with Ernest's debts incurred before and during the campaign: "All this has caused me a great deal of pain, first by the fact itself, and then by the harm it may do you"... It also mentions his half-sister, Sophie Finat, who has settled in Madrid; Ernest's intention to make long-distance or scientific voyages; the purchase of an instrument for astronomical observations, and so on.Carlota MOUCHEZ née Finat (1843-1931) wife of the admiral. 9 L.A.S., 1892, to her daughters Marguerite and Marie; 30pages in-8 (mourning). Ernest Mouchez's last voyage. In February and March 1892, Ernest Mouchez made a final trip to Algeria and Italy, accompanied by his wife and their two youngest daughters, Berthe and Fernande. This trip enabled him to meet relatives in Algeria: his brother Frédéric-Valentin Mouchez, and his seven children. This branch of the Mouchez family owned farms in the communes of Palestro (Lakhdaria), Isserville (Isser) and Draâ El Mizan, all located in Grande Kabylie. The present correspondence, written from Algiers, Constantine, Biskra, Naples, Rome, etc., was intended for the couple's two other daughters who remained in France, Marguerite (Margot) Fehrenbach and Marie Lachelier: arrival in Algiers, trip to El Biar to meet an old acquaintance, trip to and settlement in Chabet el Ameur (Isserville commune), work on the family farm, excursion to Blida, arrival in Constantine then Biskra, stays in Naples and Rome. There are also references to the family, in particular Margot's husband, the chemist Georges Fehrenbach, a collaborator of Alfred Nobel. The last letter, written from Turin after Ernest Mouchez's death on June 25, 1892, refers to a further stay in Italy in September of the same year.