[MUSIC]. [TOSCANINI, Arturo (1867?1957)]. ???SONNECK, Oscar George (1873?1928). Beethoven Letters in America. New York: The Beethoven Association, [1927]. Small folio. Numerous tipped?in facsimiles of Beethoven?s letters, most folding. Original publisher?s brown cloth lettered in black (few tiny spots of edge wear). FIRST EDITION, INSCRIBED BY TOSCANINI TO ANOTHER COMPOSER: ?To Boris Koutzen / in rememberance of our Beethoven Circle/ X May 1944, Arturo Toscanini?. Koutzen was a Russian?American violinist composer who was a member of the NBC Symphony Orchestra under Toscanini from 1937 until 1945.