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b. 83

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

..

In GC the  indication was initially written – with the copyist's hand – further, before the 3rd beat of the bar and under the bottom stave. Chopin moved it before the first f-foctave, which we reproduced in the main text.

category imprint: Corrections & alterations; Source & stylistic information

issues: Authentic corrections in GC

b. 84

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

No mark in GC (→GE) & EE

Long accent in FE

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The accent, present in FE, was deleted by Chopin in GC.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections in GC

b. 85

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

'5' in GC (→GE), FE & EE3

No fingering in EE1 (→EE2)

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The missing last fingering numeral in EE1 (→EE2) is probably an oversight of the engraver or the copyist.

category imprint: Differences between sources

issues: EE revisions , EE inaccuracies

b. 85-86

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

..

In GC there is no  raising d1 to d1, which is a patent oversight, corrected in GE.

In GC and GE2 (→GE3) there are unnecessary sharps in these bars: in GC before d2 at the beginning of the 3rd and 4th groups of semiquavers in bar 86, while in GE2 (→GE3) before d in the 2nd group in bar 85. 

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , GE revisions , Cautionary accidentals , Errors of GC

b. 86-87

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

No markings in GC (→GE) & EE

Pedalling in FE

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The pedalling of FE could have been added in the proofreading of this edition.

category imprint: Differences between sources

issues: Authentic corrections of FE