This is probably a letter from the eldest daughter of Robert and Clara Schumann, Marie. She lived until the end of her life in Interlaken, Switzerland. The author of the letter writes to a "Miss Maria" who seems to be the sister of Eduard Euler. She asks for her Schumanniana, especially drawings, since she was asked by some people for material to include a music museum. The query is posed (perhaps) because the grandparents of "Miss Maria" were friends of the Schumanns. They were Mr. and Mrs. Bendemann. Mr. Bendemann was an artist. The letter is fragmentary. At least one page is lost.
Schumann, Marie, 1841-1929. "Letter to Maria probably from Marie Schumann, 1841-1929." (1926) Digital version published by Brown Fine Arts Library, Fondren Library, Rice University: http://hdl.handle.net/1911/13029.