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b. 54

composition: Op. 27 No 2, Nocturne in D♭ major

..

Missing in A (→GE1FEEE) is the natural raising d flat2 to d2. This obvious oversight on the part of Chopin was corrected in GE2.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals

b. 55

composition: Op. 27 No 2, Nocturne in D♭ major

..

We add a cautionary flat before d flat3.

category imprint: Editorial revisions

b. 55

composition: Op. 27 No 2, Nocturne in D♭ major

 written in by mistake or by a foreign hand in A (→GE1)

 in FE (→EE), GE2 and GET

..

A (→GE1) has a cautionary  before the upper note of the last sixth of the triplet, instructing us to read that note as c3. This is obviously a mistake, corrected in the proofing of FE (→EE), GE2 and GET.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Foreign hand additions in manuscripts , Authentic corrections of FE , Annotations in GET

b. 55

composition: Op. 27 No 2, Nocturne in D♭ major

..

The  raising d flat1 to d, omitted by Chopin in A , was already supplemented in GE (→FEEE).

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Omission of current key accidentals

b. 56

composition: Op. 27 No 2, Nocturne in D♭ major

..

The rhythmic group on the 4th quaver of the bar was mistakenly written in A with the use of  notes with twice as long rhythmic values : . In GE that mistake was only partly corrected: , and it was in FE (→EE) that the correct text was inserted: .

category imprint: Differences between sources

issues: Errors in GE , GE revisions , Rhythmic errors , Errors of A , FE revisions