Autograph musical quotation from the German-American pianist and composer, grandson of inventor Samuel B. Morse and a leading proponent of the works of Claude Debussy. He has penned four measures of music marked "lustig," and signed: "With best wishes for a happy future! May you never be musical. From your celebrated friend Walter Morse-Rummel." He dates Berlin, April 23, 1906, adding at the upper left "Souvenir de 21 Rue Nouveau-d'Hiverchamp," which we take to be a comic translation of Neue Winterfeldtstrasse in Berlin. Toning; overall fine. 7.25 x 4.5 inches (18.3 x 11.1 cm).