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b. 26

composition: Op. 25 No 11, Etude in A minor

Fingering digit in GC & EE

No fingering in FE & GE

..

The fingering numeral, present in GC and EE, was overlooked in GE. Its absence in FE is certainly a result of an oversight too.

category imprint: Differences between sources

issues: Errors in GE

b. 27

composition: Op. 25 No 11, Etude in A minor

Staccato dot in FE & GE2 (→GE3)

No dot in GC (→GE1) & EE

..

In the main text we include the staccato dot present in FE. The sign was added also in GE2 (→GE3).

category imprint: Differences between sources

issues: GE revisions

b. 27

composition: Op. 25 No 11, Etude in A minor

Long accent in GC (→GE1)

No mark in FE & EE

Short accent in GE2 (→GE3)

..

The long accent, present only in GC (→GE1), could have been added there by Chopin. In GE2 (→GE3) it was replaced with a standard, short accent.

category imprint: Differences between sources; Corrections & alterations

issues: Long accents , GE revisions , Authentic corrections in GC

b. 27-28

composition: Op. 25 No 11, Etude in A minor

Accents in GC (→GE) & EE3

No marks in FE & EE1 (→EE2)

..

In GC (→GE) accents on the 4th beat of these bars were probably added by Chopin. EE3 repeated them, probably on the basis of GE.

category imprint: Differences between sources

issues: EE revisions , Authentic corrections in GC

b. 27-30

composition: Op. 25 No 11, Etude in A minor

..

In the passages including a few octaves, there are no accidentals in the sources, which, however, does not raise doubts concerning the text intended by Chopin.

In GC there are no sharps needed in the notation of f1f2 in bar 27, ff1f2 in bar 28, f2f1 (L.H.), c1 in bar 29 and fd2 in bar 30.
In FE the same signs apart from the sharps before f1 in bar 27 and f1 (L.H.) in bar 29 were omitted; moreover, the  raising d2 to d2 in bar 29 was overlooked.
GE1 completed the signs overlooked in GC except for the  raising f1 to f1 in the L.H. in bar 29.
In the remaining editions – EE and GE2 (→GE3) – all necessary signs were added.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , GE revisions , Omission of current key accidentals , Errors of GC