OJ 13/37, 2 Handwritten letter from Ernst Rudorff to Schenker, dated September 12, 1908

Rudorff thanks Schenker for a copy of his Beitrag zur Ornamentik, refers to Beyschlag's Die Ornamentik der Musik, and expresses pleasure that he and Schenker are in agreement.

OC 52/399-401 Typewritten letter from Hertzka (UE) to Schenker, dated December 18, 1908

Hertzka complains at the embarrassment that Schenker has caused him over the Instrumentations-Tabelle, and proposes releasing the Table in two versions. — He proposes that Schenker edit Book II of the Well-tempered Clavier in the manner of Busoni.

WSLB 31 Handwritten letter from Schenker to Hertzka (UE), dated December 22, 1908

Schenker agrees to the Instrumentations-Tabelle being published without his newly written Introduction. — He declines the proposal to edit the Well-tempered Clavier Book II for the new Akademie, offerin alternative suggestions and observations on Busoni's editing.

OJ 5/7a, [28] (formerly vC 28) Handwritten letter from Schenker to Cube, dated January 12, 1930

Acknowledges OJ 9/34, [20], and gives detailed critique of Cube's analysis of the C major Prelude from WTC I, including graphs; advises on additional reading and Cube's plans to publish the analysis.

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.

Diary entry by Schenker for 26 February 1913

Diary entry by Schenker for 30 June 1920

Diary entry by Schenker for 24 September 1920

Diary entry by Schenker for 11 April 1921

Diary entry by Schenker for 8 November 1926