Set of handwritten letters, most of them on scientific subje - Lot 87

Set of handwritten letters, most of them on scientific subjects concerning Louis Breguet, some addressed to his name "Monsieur Breguet". The first, "Mon cher et excellent ami" (My dear and excellent friend), refers to clocks that don't work, dated 17 8bre (October) 1874, Algiers. The second, "Cher Monsieur" and "Cher Monsieur Breguet", refers to political events, dated Tuesday June 6, 1871, Paris. The third, with EB initials and "Cher Breguet" letterhead, evokes scientific reflections, dated March 8, 1873, signed by Bertrand, member of the Académie. The fourth, on paper with a coat-of-arms and headed "Monsieur Louis Breguet de l'Institut", is a letter of thanks dated March 17, 77, signed by Larrey. The fifth with letterhead "Ministère de la Marine" refers to an order for telegraph paper, addressed to Breguet on November 9, 1874, signed by the Minister of the Navy and Colonies. A note is added: "Monsieur Roosevelt, Livré par Mr Breguet 1 téléphone de Reiss reçu de Cornelius Roosevelt le 17 janvier 1879" Cornelius Roosevelt (1794-1871) was a wealthy American businessman, member of the famous Roosevelt family and grandfather of Theodore Roosevelt, the 26th President of the United States.