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b. 24

composition: WN 17, Polonaise in B♭ major

..

The cautionary  before e1 is only in PE.

category imprint: Differences between sources

issues: Cautionary accidentals

b. 24

composition: WN 17, Polonaise in B♭ major

..

JC has a cautionary  before a1, which is unnecessary in this context.

category imprint: Source & stylistic information

issues: Cautionary accidentals , Last key signature sign

b. 25

composition: WN 17, Polonaise in B♭ major

..

In JC, the 1st quaver in the L.H., F, was overseen. The definite error is revealed by the analogy with the motifs from the subsequent bars, lack of a relevant rest, compatible version of the remaining sources.

category imprint: Interpretations within context; Differences between sources

issues: Errors of JC

b. 25

composition: WN 17, Polonaise in B♭ major

b-d1 in JC 7 PE

d1 in EF

..

Lack of  on the 5th quaver in EF is most probably a mistake – the note appears in this place both in JC and PE, as well as in all sources in analogous bar 27.

category imprint: Differences between sources

b. 26

composition: WN 17, Polonaise in B♭ major

a1 in JC

f1 in EF & PE

..

On the 4th quaver of the bar, JC has the anote, similarly as on the second. It is almost certainly a mistake, perhaps of Chopin himself committed in [AI]. Such a type of errors belongs to the most often both in autographs and copies.

category imprint: Differences between sources

issues: Terzverschreibung error , Errors in the number of ledger lines , Errors of JC