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b. 79

composition: Op. 10 No 8, Etude in F major

..

The  before the 5th semiquaver in A illustrates Chopin's idiosyncrasy, ocurring sometimes in his autographs, to write accidentals on a visibly different level than the notes they pertain to.

category imprint: Source & stylistic information

issues: Accidental below/above the note

b. 80

composition: Op. 10 No 8, Etude in F major

No accidentals in A & GE1

 e3 in FE (→EE)

Two flats in GE2 (→GE3GE4)

 &  suggested by the editors

..

Determining the sound of the 2nd and 14th semiquavers poses some difficulties. According to us, Chopin had in mind e3 and e2, respectively, same as in similar bar 76. In A, however, he forgot to insert a  before the 2nd note, such kind of oversights belongs to his most frequent mistakes – cf., e.g., bar 79. The version was included in GE1 through FE's review copy. The natural added in the last proofreading of FE (→EE) is probably an overlooked mistake of the engraver, one of a number of such mistakes committed in the Etudes and other pieces. The flats in subsequent GE,s are certainly an arbitrary addition.  

category imprint: Interpretations within context; Differences between sources; Editorial revisions

issues: Errors in FE , Authentic corrections of FE

b. 86-87

composition: Op. 10 No 8, Etude in F major

..

In both bars A has additional sharps before f3, the 10th semiquaver. In FE (→GE,EE) the superfluous signs were removed.

category imprint: Differences between sources

issues: Cautionary accidentals , Authentic corrections of FE

b. 94

composition: Op. 10 No 8, Etude in F major

..

In A there is no  raising c1 to c1. This patent inaccuracy was corrected in FE2, GE and EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Authentic corrections of FE , Inaccuracies in A

b. 94-95

composition: Op. 10 No 8, Etude in F major

Chords in A

FE (→GE,EE)

..

Chopin introduced a different edition of the final chords while proofreading FE (→GE,EE). In bar 95 the notation of A is unclear, as far as the rhythmic values are concerned – f2 (the lowest note in this version) has a minim stem, which is incomprehensible in this context. In A it is also the most probably erroneous c2 in the 2nd chord in the R.H. (changed later in a proofreading of FE to d2) that draws attention. It is probably an unadjusted mark of the still earlier version whose traces are visible in A

category imprint: Interpretations within context; Differences between sources; Corrections & alterations

issues: Corrections in A , Authentic corrections of FE