A 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 an intimate of Eugenie Schumann, daughter of Clara Wiek and Robert Schumann. While the present letter is to our knowledge unpublished, it may have been copied by Sauermann in the context of her correspondence with Eugenie Schumann in the preparation of her published memoirs.