Grouping of signed and unsigned items from the stage director of the Staatsoper in Berlin, who directed the first performance of Berg's "Wozzeck" on 14 December, 1925. The grouping includes: a typed and signed note dated 12 March, 1929 on Staatsoper letterhead; an unsigned similar note dated 11 April, 1931; a grouping of opera tickets, various dates with a signed presentation from Horth; two program pages, each with a printed photograph of the conductor.