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b. 78

composition: Op. 25 No 10, Etude in B minor

No mark in GC (→GE) & EE

Accent in FE

..

The accent was most probably added by Chopin at the time of proofreading FE.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 79-82

composition: Op. 25 No 10, Etude in B minor

No signs in GC (→GE) & EE

Pedalling in FE

Our suggestion

..

Omission of the pedalling signs in FE in bar 80 is certainly an oversight (cf. bars 31-32), therefore, in the main text we suggest to complete them after all previous analogous bars.

category imprint: Differences between sources; Corrections & alterations

issues: Inaccuracies in FE , Authentic corrections of FE , Omitted correction of an analogous place

b. 79-80

composition: Op. 25 No 10, Etude in B minor

No slur in GC (→GE) & EE

Slur in FE

..

The slur embracing the phrase in the middle voice was added by Chopin most probably in the proofreading of FE.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 79

composition: Op. 25 No 10, Etude in B minor

 in GC (→GE1) & EE

No sign in FE

 in GE2 (→GE3)

..

According to us, regardless of how the difference occurred (in the sources there are no clear traces of possible corrections in this regard), omission of the  hairpins in FE was a conscious and final decision of Chopin. In Chopin notation, this kind of sign emphasises the note or group of notes, which in this case would suggest beginning the phrase of the middle voice together with the return of the main thematic link in this part, contrary to the later, consistent markings of FE.
Extension of the sign in GE2 (→GE3) is a typical for this editor routine revision.

category imprint: Differences between sources

issues: GE revisions

b. 80

composition: Op. 25 No 10, Etude in B minor

Quaver b in GC (→GE) & EE1

Crotchet d1 in FE & EE2

Crotchet & quaver in EE3

category imprint: Differences between sources; Corrections & alterations

issues: EE revisions , Authentic corrections of FE