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b. 40-42

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

Slurs in A & FE (→GE1) (literal reading), GE2 (→GE3GE4) & EE

Probable interpretation of A

Possible interpretation of A

Possible interpretation of FE

..

Lack of slurs in bars 40-42 seems to be Chopin's oversight – it is revealed by both the musical context and some graphic features of the slurs of A and FE. In A the bars are written with an octave sign, which Chopin could mistakenly perceive as a slur (it is on the level of the slur from bars 38-39); moreover, the 1st slur in bar 43 suggests a continuation from bar 42 on the previous page. In turn, in FE (→GE1) the end of the slur in bar 39 is led to the bar line, contrary to A, which suggests its continuation in bar 40 in a new line (in the remaining editions the slur was shortened). Taking this into account, in the main text we suggest to add the slurs in a way which could stem from the notation of A, as well as alternative possibilities including also the suggestion of FE

category imprint: Interpretations within context; Editorial revisions

issues: EE revisions , Inaccuracies in FE , Inaccurate slurs in A , GE revisions

b. 40

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

..

Before the last chord in A there are no naturals returning c2 and c3. The accidentals were probably added only in the last proofreading of FE (→EE), as they are not included in GE1 (they were added in subsequent GE,s).

category imprint: Interpretations within context; Differences between sources

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

b. 40

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

a in A (→FEGE) & EE4

in EE3

..

Lack of the  in EE3 before the lowest note of the last chord is certainly an error, corrected in EE4.

category imprint: Differences between sources

issues: EE revisions , Errors in EE

b. 41

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

..

In the last proofreading of FE (→EE) a cautionary  before was added before the 4th chord (the accidental is absent both in A and GE). We add naturals before d1 and d2 in the 2nd chord instead. 

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals , Authentic corrections of FE

b. 42

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

f in A, GE & EE

g in FE

..

as the lowest note of the 3rd chord is almost certainly an error of the engraver of FE.

category imprint: Differences between sources

issues: EE revisions , Errors in FE , GE revisions