PE
Main text
JC - Jędrzejewicz Copy
PE - First Polish Edition
EF - Editions by Fontana
FEF - French edition by Fontana
GEF - German edition by Fontana
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  b. 10

JC has a  before a in the chord on the 3rd beat of the bar. In this harmonic context, the sign is unjustified. 

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category imprint: Differences between sources

issues: Cautionary accidentals, Last key signature sign

notation: Pitch

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Original in: The Fryderyk Chopin Institute Library, Warsaw