Serkin, Rudolf. (1903–1991) Two Important Autograph LettersPair of rare and extraordinary autograph letters from the Austrian American pianist, in German. To his friends Hans Erich and Gerda Riebensahm in Berlin. Both letters signed "Ruli." From the collection of Dietrich Fischer Dieskau. The earlier letter (dated March 23, [19]38, 8 pp. [two bifolia], 8vo, on headed paper of the Italian vessel M N Vulcania) was written at sea in the Mediterranean. Serkin, who at the time lived in Switzerland, opens with a