OJ 9/34, [2] Handwritten letter from Cube to Schenker, dated August 14, 1926

Cube is having difficulty getting his father to pay Schenker for lessons given over the previous year, and asks Schenker to write firmly to the latter; speaks of his attempts to make contacts within Düsseldorf artistic circles.

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 5/7a, [15] (formerly vC 15) Handwritten postcard from Schenker to Cube, dated May 28, 1928

Schenker sends Cube an article written for the Beethoven centenary festival and suggests a "connection" between Bonn and Düsseldorf; refers to American professors teaching the Urlinie in the USA; outlines summer plans.

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 5/7a, [17] (formerly vC 17) Handwritten letter from Schenker to Cube, dated July 13, 1928

Schenker offers consoling words for low turn-out to Düsseldorf lecture; praises recent article by Cube, but corrects overstated connection between himself and Brahms and Joachim.

PhA/Ar 36, [1] Carbon copy of a typewritten letter from Anthony van Hoboken to Heinrich Schenker, dated September 15, 1930

Hoboken sends his scoring of a C. P. E. Bach harpsichord concerto for Schenker to check in connection with a planned new collected edition of the works of that composer.

OJ 9/34, [25] Handwritten letter from Cube to Schenker, dated May 9, 1931

Cube describes his feelings and final dealings with the Conservatory in Duisburg, and preparations for work with Violin in Hamburg; he reports on his two best pupils, Erich Voss and Lieselotte Müller.

Diary entry by Schenker for 27 March 1907

Diary entry by Schenker for 26 May 1928

Diary entry by Schenker for 10 July 1928