GE1
Main text
A - Autograph
FC - Fontana's copy
FE - French edition
FE1 - First French edition
FE2 - Corrected impression of FE1
FED - Dubois copy
FEJ - Jędrzejewicz Copy
FES - Stirling copy
FESch - Scherbatoff copy
GE - German edition
GE1 - First German edition
GE2 - Revised impression of GE1
GE3 - Corrected impression of GE2
EE - English edition
EE1 - First English edition
EE1a - Corrected impression of EE1
EE2 - Revised impression of EE1a
compare
  b. 5

c-c1 w A, literal reading (→FE,FCGE1)

c-c1 in EE, GE2 (→GE3) & FES

The missing naturals raising c-c1 to c-c1 are almost certainly Chopin's mistake. It is indicated by the naturals added by Chopin in FES as well as by the cautionary  written in A before c1 in the next bar (eventually crossed out), which suggests that Chopin assumed that it was c that was valid there*.
The naturals were added in EE and GE2 (→GE3).


* A precautionary approach should be taken in the case of a reasoning based on a cautionary accidental – in b. 12 in A we can also observe crossed-out flats before c-c1, although the sound of those notes had already been consolidated at the beginning of b. 10 (Chopin was not always certain which accidentals were included in the key signature).

Compare the passage in the sources »

category imprint: Interpretations within context; Differences between sources; Source & stylistic information

issues: Annotations in teaching copies, EE revisions, GE revisions, Omission of current key accidentals, Deletions in A, Annotations in FES, Last key signature sign

notation: Pitch

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Original in: Zbiory prywatne (kolekcja Jana Ekiera), Warszawa