Mali Pfitzner, the widow of Hans Pfitzner, thanks in this letter Swarowsky having conducted a performance of Palestrina without rehearsal. 'Finally there is someone in Vienna who can conduct Palestrina'.
Mali refers to two performences of the cantata she heard with Keilberth in Munich and how much she enjoys being in Vienna. The last time apparently was together with Swarowsky in the air-raid shelter of the hotel Imperial in May 1945.