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b. 28

composition: Op. 28 No. 19, Prelude in E♭ major

..

In front of the first R.H. quaver (a2), A and the remaining sources have a  (cautionary?) which we omit in the main text as groundless.

category imprint: Editorial revisions

issues: Cautionary accidentals , Last key signature sign

b. 29

composition: Op. 28 No. 19, Prelude in E♭ major

..

In A one can see crossed-out  and  before the 5th and 6th R.H. notes, which is yet another proof that the composer was convinced that accidentals were valid also in adjacent octaves (at least in such a context). The accidentals were added only in GE and EE.

category imprint: Interpretations within context; Differences between sources; Corrections & alterations; Source & stylistic information

issues: EE revisions , Accidentals in different octaves , GE revisions , Deletions in A , Inaccuracies in A , Errors repeated in FE

b. 30

composition: Op. 28 No. 19, Prelude in E♭ major

..

A and the remaining sources contain 3 poorly justified cautionary accidentals in this bar – flats before e1 and e2 and a  before f2. We omit them in the main text; in turn, we add a  raising g1 to g1, which is necessary and which was overlooked in A. The sharp was added both in FC (→GE) and FE (→EE).
Moreover, FE overlooked the  raising f to f, which was corrected in EE.

category imprint: Interpretations within context; Differences between sources

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

b. 31

composition: Op. 28 No. 19, Prelude in E♭ major

..

In A (→FC,FEEE1) there is no  raising e to e. The inaccuracy was corrected in GE and EE2.
In the main text we add a cautionary  before g (Chopin added a respective accidental only before g1 in the R.H. part). It was already added in EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Cautionary accidentals , Inaccuracies in A , Errors repeated in EE

b. 32

composition: Op. 28 No. 19, Prelude in E♭ major

..

A and the remaining sources lack the  restoring a2. In the main text we add a cautionary  before d3.

category imprint: Interpretations within context; Differences between sources; Editorial revisions

issues: Omissions to cancel alteration , Errors repeated in GE , Errors repeated in FE , Errors repeated in EE