Vollrads, Matuschka Greiffenklausches Archiv = Graf Matuschka Greiffenklausches Archiv, Schloss Vollrads (Rheingau), Germany.
[In 1999 the castle was sold to a bank: 'Nassauische Sparkasse'. I do not know what happened to the castle's Archive - which is registered in Germany's list of Nationally Valuable Cultural Treasures, nr. 00713]