- FondsPP - Helen Martens fonds
- Series4 - Felix Mendelssohn research
- 6494 - Untitled
- 14 more...
- File15 - Notes on Mendelssohn’s expression through music
- File16 - Sheet music and notes on Mendelssohn’s musical style
- File17 - Annotated score by Mendelssohn
- File18 - Research and notes on Mendelssohn’s songs
- File19 - Notes on keys of Mendelssohn’s songs
- File20 - Annotated analysis of Mendelssohn’s A quartet
- File21 - Sheet music written by Mendelssohn
- File22 - Annotated source on Mendelssohn
- File23 - Photocopies of sheet music and notes
- 34 more...