- Felix Salzer papers /
- Series 2: Heinrich Schenker Nachlass /
- Sub-series 1: Study of thoroughbass, analyses of J.S. Bach, miscellaneous notes (Mappe 6) /
- Notes on J.S. Bach's Generalbassbüchlein (and other notes on Generalbass) /
- 6/221 - 6/224 /
- Recto: Draft of an unidentified essay, in the hand of Heinrich Schenker [n.d.]; mention of Bach, Brahms, and Händel