Page:
Source:
p. 7, b. 171-195
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In A there is no 
lowering c1 to c
1. This patent oversight was corrected already in GE1 (→FE→EE, →GE2), perhaps by Chopin. Moreover, a cautionary 
before c1 was added in the next bar.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources
issues: Omission of current key accidentals, Errors of A, Authentic corrections of GE
notation: Pitch
Missing markers on sources:
A, Morch, GE1, GE1a, GE2, FE1, FE2, FED, FEJ, FES, EE1, EE2, EE3