Spohr, Louis. Adagio for Fagott und Klavier. Ewell, Terry B. (20 August 1994). Five measures from the end on F3 and E3 add the R. H. E key for a darker sound and pianissimo control.
F3: E3: o o o | o o o x o o | o o o w E w E
Suggested Heckel bassoon fingerings for musical passages