Passini, Ludwig - Set of 2 Autograph Letters Signed

Austrian painter (1832-1903) of Italian ascend.

Set of 2 autograph letters signed by the painter: one of them is 2 pages long, the other is 3 pages long; both in German (sold untranslated).  Size is the same for both: 4.5 x 7 inches, central folds, in excellent condition.