In the main text we omit the cautionary flats, present in the sources, next to c
3 in the R.H. (in A in bar 17 before both notes; similarly in bar 18). It is an obvious example of Chopin's insecurity concerning the issue of presence of particular accidentals in the key signature. Cf. the note on c2 in the L.H. in bar 17.
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category imprint: Editorial revisions; Source & stylistic information
issues: Cautionary accidentals, FE revisions, Last key signature sign
notation: Pitch