WSLB 143 Handwritten letter from Schenker to Hertzka (UE), dated November 27[–28], 1912

Schenker requests another copy of Beethoven Op. 109, and lists the sources he has now consulted, the communications with scholars, the cost and time involved, proclaims the "spectacular" findings made, and the incompetence of all previous editors unmasked.

OJ 89/7, [7] Typewritten letter (carbon copy) from Hoboken to Schenker, dated March 15, 1934

Hoboken outlines plans to expand publicity for the Photogram Archive. — Reports re his work on Chopin's Scherzo Op. 54, which he will bring to his April 3 lesson. — Refers to the invitation to Schenker to contribute to the journal of the Reichsmusikkammer.

Diary entry by Schenker for 19 June 1917

Diary entry by Schenker for 19 December 1919

Diary entry by Schenker for 22 October 1920

Diary entry by Schenker for 28 December 1927

Diary entry by Schenker for 16 December 1928