[Brahms, Johannes. (1833–1897)] Billroth, Theodore. (1829–1894) Autograph LetterA handwritten copy of an 10 29 1881 letter from the Prussian surgeon and amateur musician, famous as a close friend of Brahms in Vienna from 1867. The letter deals extensively with a recent Brahms performance and includes musical notation. The present copy of the letter, addressed to Prof. Lubke in Stuttgart, is apparently in the hand of Friederike Sauermann, a singer in the Hamburger Frauenchores, a member herself of the Brahms Schumann circle, and