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b. 31

composition: Op. 50 No. 2, Mazurka in A♭ major

..

In A1 (→FEEE) there is a cautionary  before the dminim. The absence of the sign in GE may mean that Chopin realised that it is superfluous here while writing [A2].

category imprint: Differences between sources

issues: Cautionary accidentals , Last key signature sign

b. 40

composition: Op. 50 No. 2, Mazurka in A♭ major

..

In the main text we add cautionary flats before d2 and e. The former was already added in FE (→EE). A1 and GE are devoid of cautionary accidentals in this bar.

category imprint: Differences between sources

issues: Cautionary accidentals , FE revisions

b. 43-51

composition: Op. 50 No. 2, Mazurka in A♭ major

..

Just like in b. 12 and 20, in the main text we include the cautionary flats before a1 in b. 43 and 51, added in the first stage of proofreading of FE (→EE). 

category imprint: Differences between sources

issues: Cautionary accidentals , FE revisions

b. 47

composition: Op. 50 No. 2, Mazurka in A♭ major

..

Just like in b. 16, in the main text we add cautionary flats before e2 and e1. The latter was already added in the proofreading of FE (→EE).

category imprint: Differences between sources; Corrections & alterations

issues: Cautionary accidentals , FE revisions

b. 56

composition: Op. 50 No. 2, Mazurka in A♭ major

..

Just like in b. 25, in the main text we take into account the cautionary  before e1, present in GE and added in the first stage of proofreading of FE (→EE).

category imprint: Differences between sources; Corrections & alterations

issues: Cautionary accidentals , FE revisions