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b. 158

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

Both autographs are lacking in the  restoring e on the 3rd beat of the bar, which is a patent oversight. The accidental was added in FE (→EE), which could have been performed by the reviser. It is also present in GE, and the layout of the accidentals before this dyad in GE1 also points to the fact that the sign was added in print (cf. the correct layout in GE2). 

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , GE revisions , Errors of A , FE revisions

b. 160

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

AI is lacking in a  restoring f1 on the 2nd beat of the bar; in turn, it features a superfluous  before c1. All the remaining sources contain the necessary sign before f1, yet it is only GE in which there is no  before c1.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , GE revisions , Cautionary accidentals

b. 160

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

There is an unjustified  (cautionary?) before the A crotchet in GE. It is difficult to tell whether the accidental was already in [AG], and if not, whether it was added by the reviser or by Chopin.

category imprint: Differences between sources

issues: Cautionary accidentals

b. 161

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

Both autographs are lacking in the  before the 2nd L.H. quaver (d). The inaccuracy was removed in FE (→EE), which in the case of such a patent defect could have been performed by the reviser. The correct text is also in GE.
Before e1 on the 3rd beat of the bar, all sources except for GE feature a superfluous .

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Cautionary accidentals , FE revisions , Inaccuracies in A

b. 162

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

The autographs are lacking in cautionary accidentals in this bar. In FE (→EE) a  was added before the d crotchet; the sign is also present in GE. Moreover, in EE was added before the ccrotchet. In the main text we include both accidentals.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , Cautionary accidentals , FE revisions