[samibe]

These are the Color Albums of Twenty Pieces for the Organ.
I'm planning on adding each volume as a separate post in this thread.
The volumes that I know of are:
1. Red
2. Blue
3. Green
4. Yellow
5. Brown
6. Golden
7. Gray
8. Silver
9. Orange
10. Purple
11. Buff
12. Black

PDFs of several of these are available on IMSLP.