Charles, Archduke of AUSTRIA (1771-1847) younger brother of Emperor Francis I and great warrior. L.S. with autograph compliment, Regensburg January 14, 1809; 1 page in-fol. He thanks his correspondent for his good wishes and recalls with pleasure "the moments we spent together, of which you are a sure guarantee of the reciprocity of my feelings"... He ends in his own handwriting: "your very humble and devoted friend Charles".