In the main text we add a cautionary 
to f1. Chopin wrote in this bar a cautionary to F in the middle of the bar, which was supplemented by FE (→GE,EE), in which an accidental was added to f. We also include those accidentals in the main text.
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category imprint: Differences between sources; Editorial revisions
issues: Cautionary accidentals, Authentic corrections of FE, FE revisions
notation: Pitch