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b. 4

composition: Op. 10 No 6, Etude in E♭ minor

No fingering in A

Fingering in FE (→GE,EE)

..

The fingering was added by Chopin in a proofreading of FE (→GE,EE).

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 4-13

composition: Op. 10 No 6, Etude in E♭ minor

..

We add cautionary flats before e1 in bars 4 and 12 and e in bars 5 and 13. First three were already added in GE and EE4.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 4

composition: Op. 10 No 7, Etude in C major

..

Before the 7th semiquaver in A there is no  returning e1. However, there is a  before e1 on the 9th semiquaver, which would be unjustified, if the 7th and 8th semiquavers were meant to be e1. Therefore, an oversight of the  is beyond any doubt and it was confirmed by an accidental added in a proofreading of FE (→GE,EE). Analogous bar 37 is written correctly already in A. Cf. bar 12.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , Errors of A , Authentic corrections of FE

b. 4-12

composition: Op. 10 No 7, Etude in C major

..

In GE3 (→GE4) a  was added before b1 at the end of bar 4 and b2 in bar 12, which can be regarded as formally justified.

category imprint: Differences between sources

issues: GE revisions

b. 4-12

composition: Op. 10 No 7, Etude in C major

Crotchets g & G in A

..

In bars 4 and 12 additional crotchet stems were omitted in the editions, perhaps due to a misunderstanding of A by the engraver of FE.

category imprint: Differences between sources

issues: Inaccuracies in FE