Book: 'Nachlass, Johann Orth, Sammlung Schloss Valkenhayen,' Berliner kunstauktions-Haus, 1904 (Estate of the Johann Orth, named Archduke Johann Nepomuk Salvator from the castles land and Seeschloss Orth, property Toscana, house Stockel collection Schloss Valkenhayn/exhibition