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b. 16

composition: Op. 26 No 2, Polonaise in E♭ minor

..

We add a cautionary  next to g1 in the L.H.

category imprint: Editorial revisions

b. 17

composition: Op. 26 No 2, Polonaise in E♭ minor

..

A has a cautionary  next to c2 in the L.H. The accidental was omitted, supposedly by accident, in FE (→GE1,EE1), and reinstated afterwards in later GE and EE2.

category imprint: Editorial revisions

issues: Cautionary accidentals

b. 18

composition: Op. 26 No 2, Polonaise in E♭ minor

..

A has no  lowering d1 to d1 on the 3rd beat. The undoubted Chopin's mistake was corrected already in FE1, possibly at his direction.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , Errors of A , Authentic corrections of FE

b. 18

composition: Op. 26 No 2, Polonaise in E♭ minor

..

GE1 and GE3 (→GE4) added a cautionary  next to g3 on the 1st beat.

category imprint: Editorial revisions

issues: GE revisions , Cautionary accidentals

b. 18

composition: Op. 26 No 2, Polonaise in E♭ minor

..

The sources have cautionary flats next to c2 in the L.H. and c3 on 4th semiquaver in the R.H. Furthermore, in A – similarly to bar 17 –  next to c3 is repeated before the following crotchet.

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals , Last key signature sign