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b. 26-28

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

..

As was the case in b. 18 and 20, Chopin changed in A the last L.H. note from g to d.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Accompaniment changes

b. 26-27

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

Pedalling in A (→FE,FCGE)

Pedalling in EE

Pedalling after bars 18-19 suggested by the editors

Our alternative suggestion

Our variant suggestion

..

Performing the 3rd beat of b. 26 and the 1st beat of b. 27 with one pedal is inconceivable in the sonic atmosphere of the Prelude, although it is difficult to state what misled Chopin and which pedalling markings he wanted to insert here. According to us, it is most likely that it was to be the initial pedalling in b. 18-19: . Chopin could have wanted to forgo the first change of pedal in b. 27 (after b. 25: ), yet he wrote the pedal encompassing 2 beats a triplet too early.

In the main text we give the unequivocal, final pedalling of analogous b. 18-19. As an alternative solution, we give the literally interpreted version of A, supplemented with a pedal change between b. 26-27, as well as a variant version, which includes both aforementioned possibilities.
The version of EE is either an arbitrary revision or a mistake. 

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

issues: EE revisions , Errors of A

b. 28-32

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

Pedalling in A (→FEEE)

No markings in FC (→GE)

..

These bars constitute the last line of the 1st page in FC. Perhaps this was the reason for the copyist's distraction, since he overlooked all performing indications therein – pedalling, the  hairpin, the cresc. - - - indication and the R.H. slur at the end of this section. None of the above markings are in GE1; in turn, GE2 (→GE3) added only the cresc. - - - indication.

category imprint: Differences between sources

issues: Errors of FC

b. 28

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

in A (→FEEE)

No sign in FC (→GE)

..

The absence of the  sign is an oversight by the copyist in FC (→GE). See the note below.

category imprint: Differences between sources

issues: Errors of FC

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