OJ 9/34, [10] Handwritten letter from Cube to Schenker, dated January 30, 1928

Cube reports progress in his class and private teaching, performance of his compositions, his forthcoming lecture; outlines plan for an exhibition in Duisburg to celebrate Schenker's 60th birthday; has heard nothing of Hoboken's "Aufruf."

OJ 9/34, [11] Handwritten letter from Cube to Schenker, dated April 24, 1928

Cube describes difficulties with his colleagues, loss of pupils, and reactions to his lecture; Scheuermann and Schmemann will put Schenker exhibits in their shop windows, items requested; inquires after Weisse journal plan.

OJ 9/34, [13] Handwritten letter from Cube to Schenker, dated July 6, 1928

Cube reports on Scheuermann exhibit, and consequent interest and sales, encloses associated newspaper article; also on recent lecturing and composition activity. He is unlikely to visit Schenker this year; recalls people at Galtür.

OJ 9/34, [14] Handwritten letter from Cube to Schenker, dated October 4, 1928

Cube acknowledges OJ 5/7a, [18] and [19], and comments; reports on his own recent activities and plans, and on events in the Conservatory, on a forthcoming Schubert festival, and Radio Vienna. He is about to return the Hammer etching.

OJ 9/34, [22] Handwritten letter from Cube to Schenker, dated November 22, 1930

Cube thinks attending Weisse's lectures would enable him to make contact with "people of stature" in Berlin, where he would like to teach Schenker's theory, and asks Schenker for the time and place, referring to the difficulties of travel in these "catastrophic times." Will check up on Reichert. Has been invited to give six lectures locally, and has a concert of his compositions coming up.

OJ 9/34, [23] Handwritten letter from Cube to Schenker, dated February 10, 1931

Cube acknowledges issue of Der Kunstwart; encloses a letter from Walter Braunfels responding to his plans to establish a Rhineland base for Schenkerian teaching at the Cologne Hochschule für Musik; wonders whether Anthony van Hoboken might be approached for financial assistance on this, and if so how the approach should be made.

Diary entry by Schenker for 18 June 1933