Set of handwritten letters with official headed paper addres - Lot 100

Set of handwritten letters with official headed paper addressed to "Monsieur Breguet". The first dated March 26, 1828 with letterhead ECOLE ROYALE des Arts et Métiers de Châlons, Le Directeur to Monsieur Breguet in Paris "la lettre que je vous ai dressé contenait une facture ... votre très humble serviteur" signed le Vte de Boisset and addressed to "Monsieur Breguet quai de l'horloge à Paris" postmarked "CHALONS 49". The second dated 29 7bre (septembre) 1824 with letterhead ECOLE ROYALE des Arts et Métiers de Châlons, Le Chef de l'Instruction à Mr Breguet à Paris "monsieur et ami" signed Jeandeau. The third, dated July 10, 1825, on ECOLE ROYALE des Arts et Métiers de Châlons letterhead: "I have just read, sir, the wise reply you made on June 26 to the student Bruneau ... in a few words, you gave him the best principles of order and conduct, and convinced him of the need for a rule ..." signed Vte de Boisset.