Autograph Letter Signed, addressed ‘Monsieur’, written on leaving London, expressing fulsome thanks for hospitality received. In French. 1 page 7½ x 4½ inches, lightly mounted at the corners on part of an old album page. In good condition. London, 10 April 1845. Jean-Jacques Barre (1793-1855), engraver at the Monnaie de Paris between 1842 and 1855. In this position, he engraved and designed French medals, the Great Seal of France, bank notes and postage stamps. He is named Jean-Jacques Barre in numismatic publications and Jacques-Jean Barre in philatelic ones. From the late 1840s until 1855, he created the first two French postage stamp designs: the Ceres series and Napoleon III series. His two sons, artists themselves, succeeded him at the post of general engraver.