OJ 15/16, [8] Handwritten letter from Weisse to Schenker, dated August 10, 1912

Weisse speaks of Schenker's monograph on Beethoven's Ninth Symphony and progress with his own string quintet; — reiterates his desire to transfer from Violin to Schenker for piano lessons; — refers to lectures that he is about to take with Guido Adler, and quotes from Florence May's biography of Brahms. — He will write to Lorle Meissner; — gives his address in Pontresina.

OJ 10/3, [1] Part of handwritten letter from Ludwig Scheibler to Otto Erich Deutsch, dated September 6, 1913

Scheibler states that the pieces contained in Schenker's C. P. E. Bach: Klavierwerke are late works and inferior to the early and middle-period works.

OJ 89/4, [3] Handwritten letter from Schenker to Hoboken, undated [March 23, 1930]

Schenker reacts to Hoboken's news that he has been consulting Breithaupt on piano technique, and defines Hoboken's character as a pianist.

OJ 5/11, [1a] First draft of a handwritten letter from Schenker to Furtwängler, in Jeanette Schenker’s hand, dated November 11‒16, 1931

OJ 5/11, [1b] Second draft of a handwritten letter from Schenker to Furtwängler in Jeanette and Heinrich Schenker’s hand, dated November 11‒16, 1931

OJ 12/6, [10] Typewritten letter from Jonas to Schenker, dated March 3, 1932

Jonas reports on his course on Schenker's theory at the Stern Conservatorium, two forthcoming lectures, an article intended for publication, two radio talks and a radio recital; includes reference to his later textbook Das Wesen des musikalischen Kunstwerks.

Diary entry by Schenker for 7 November 1926

Diary entry by Schenker for 28 November 1926

Diary entry by Schenker for 7 December 1926

Diary entry by Schenker for 16 February 1927

Diary entry by Schenker for 20 February 1927

Diary entry by Schenker for 15 March 1927

Diary entry by Schenker for 4 December 1927