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b. 48

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

..

In A there is no cautionary  before b1 at the beginning of the bar. The sign was added in FE (→EE), probably during the last proofreading, as it is absent in GE1. In subsequent GE,s it was however completed, while in GE3 (→GE4) a  before b2, the 4th semiquaver, was also added. 

category imprint: Differences between sources

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

b. 49

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

..

In A (→FE) there is no  before the 4th semiquaver, which is a patent oversight. The sign was added in GE and EE. All signs in the 2nd group of semiquavers are our addition, introduced due to different rules of their validity with an octave sign.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , Accidentals in different octaves , GE revisions

b. 50

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

..

In A (→FE) there are no accidentals in this bar. The cautionary  before c2 was added in GE and EE4. The sign before d2 is our addition.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 51

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

c3 without  in A (→FE), and with   in EE & GE3 (→GE4)

c3 in GE1 (→GE2)

..

In A (→FE) there is no accidental before the 4th semiquaver. There is no reason to doubt that it is a typical of Chopin inaccuracy, resulting from the rules of validity of the accidentals, which in fact were not fully established in Chopin's notation. It is confirmed by the  written in this place in FED. In spite of this, in GE1 (→GE2) there is a  before this note, which is certainly a mistake.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Annotations in FED , Accidentals in different octaves , Errors in GE , GE revisions , Inaccuracies in A

b. 52

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

..

Cautionary accidentals before c1 and c3 were added by us.

category imprint: Editorial revisions