Issues : Accidentals in different octaves

b. 3-11

composition: Op. 28 No. 19, Prelude in E♭ major

..

In A (→FC,FE), there are no naturals raising b to b in b. 3 and 11. Similar inaccuracies in the notation of notes separated by an octave are often to be found in the Preludes; in this one and in some others, they are even a rule – cf. e.g. the Prelude in F Minor No. 8, b. 1-4. The accidentals were added in GE and EE.
Similarly in b. 35.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Inaccuracies in A , Errors repeated in FE

b. 13

composition: Op. 28 No. 19, Prelude in E♭ major

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In A there is no  lowering g1 to g1 in the 1st triplet and no  raising f1 to f1 in the 3rd triplet. What is more, the crossing-out before the first note suggests that Chopin crossed out the initially written  (see b. 29). The accidentals were added in GE and EE2 (in EE1 only the ). 

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Inaccuracies in A , Errors repeated in FE , Errors repeated in EE

b. 14-15

composition: Op. 28 No. 19, Prelude in E♭ major

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In A (→FC,FE) there are no naturals raising a1 to a1 in these bars. The accidentals were added in GE and EE.
In b. 14 Chopin put a cautionary  before g2; in the main text we also add a  before g1.

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

issues: EE revisions , Accidentals in different octaves , GE revisions , Cautionary accidentals , Errors repeated in FE

b. 17-20

composition: Op. 28 No. 19, Prelude in E♭ major

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In A (→FC,FE) there are no flats lowering D to D in b. 17, g to g in b. 18 and 20 and d2 to d2 in b. 18. Some of them were added in GE (only both in b. 18) and EE1 (all in the L.H.); however, it is only EE2 that contains the correct text.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Inaccuracies in A , Errors repeated in GE , Errors repeated in FE , Errors repeated in EE

b. 21

composition: Op. 28 No. 19, Prelude in E♭ major

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In A (→FC,FE) there are no accidentals in the 2nd L.H. triplet. Out of the two necessary flats, in GE and EE only one was added, the one lowering g to g.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Inaccuracies in A , Errors repeated in GE , Errors repeated in FE , Errors repeated in EE