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Source:
p. 18, b. 228-254
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None of the sources includes accidentals before the last octave except GE3, in which a 
restoring c-c1 was added (due to the use of con 8va, one accidental was enough). In this context, Chopin's mistake is obvious.
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category imprint: Interpretations within context; Differences between sources
issues: Omissions to cancel alteration, GE revisions, Errors of A
notation: Pitch
Missing markers on sources:
AsI, A, GE1, GE2, GE3, FESB, FE2, EE1, EE2, EE3, FE1