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b. 17-21

composition: Op. 10 No 11, Etude in E♭ major

..

In bar 17 we add cautionary naturals before f1 and f2. In bar 19, in a similar situation, the signs are already included in A.

In bar 17 in A there is a visible trace after the change of the lower note of the 3rd chord in the R.H. from g1 to f1. Chopin introduced similar changes also in bars 19 and 21. Cf. bar 22.

category imprint: Editorial revisions; Corrections & alterations

issues: Corrections in A , Cautionary accidentals

b. 18

composition: Op. 10 No 11, Etude in E♭ major

..

The text does not raise any doubts here, yet the notation of accidentals differs in particular sources and it is not always precise. In FE the  before the 1st chord in the L.H. was initially placed at the pitch of c1 and it was probably at this stage that the copy constituted the base text for GE, in which the accidental was moved to the correct place (before g). In FE (→EE) the  before c1 was eventually changed to a , yet the necessary  before g was added only in EE. In GE2 (→GE3GE4) a  was added before c1, as well as before c2; the latter was also introduced in EE4. In A there is no flat before gin the 5th chord, which was already added in FE (→GE,EE).

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , GE revisions , Cautionary accidentals , Authentic corrections of FE

b. 19-21

composition: Op. 10 No 11, Etude in E♭ major

..

In A there is a visible change of the inner note of the 5th chord in the R.H. – in bar 19 Chopin first wrote e2, which he then changed to f2, while in bar 21 he changed g2 to f2.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A

b. 20

composition: Op. 10 No 11, Etude in E♭ major

..

The cautionary natural before d2 is present in all sources. In turn, the relevant sign in the L.H. was added only in GE2 (→GE3GE4) and EE4.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals

b. 21

composition: Op. 10 No 11, Etude in E♭ major

..

The cautionary flat before d in the 5th chord is included in all sources. In turn, a relevant accidental in the R.H. was added only in GE2 (→GE3GE4) and EE4.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals