In the main text we add cautionary sharps before f
2 in b. 500 and 502 and f1 in b. 504. In b. 502 Chopin started writing a 
in A, yet he quickly abandoned it and crossed out the germ of that accidental. The accidentals were gradually added in GE: in b. 500 already in GE1, while in the remaining ones – in GE2 (→GE3). The sharp in b. 500 was added also in FESf.
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category imprint: Differences between sources; Editorial revisions; Source & stylistic information
issues: Annotations in teaching copies, GE revisions, Cautionary accidentals, Deletions in A, Annotations in FESf
notation: Pitch