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b. 9-26

composition: Op. 42, Waltz in A♭ major

..

We add cautionary flats next to din bar 9 and ein bar 10, as well as next to the respective notes in bars 25-26. The additions were also performed in GE1 (→GE2GE3).

category imprint: Differences between sources

issues: Cautionary accidentals

b. 9-13

composition: Op. 10 No 2, Etude in A minor

No indication in CLI, Ap & FE (→EE,GE1GE2GE3)

in GE4 (→GE5)

..

As in bar 5, the  indication in bars 9 & 13 was added by the reviser of GE4 (→GE5).

category imprint: Differences between sources

issues: GE revisions

b. 9-10

composition: Op. 10 No 4, Etude in C♯ minor

Slurs in AI, contextual interpretation

Slurs in FE (→GE,EE)

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It is possible that at the time of writing AI, Chopin considered the slurs in bar 9 as valid also later, in bars 10-11. In the main text we give the later and fuller slurring of FE (→GE,EE).

category imprint: Differences between sources

b. 9-11

composition: Op. 10 No 4, Etude in C♯ minor

 in bars 10-11 in AI

 in bar 9-10 in FE

 in bar 9 in GE

 in bar 9 in EE

..

The hairpins of AI, leading to  in bar 11, is an earlier concept of dynamic indications. In the main text we stick to the version of FE, reproduced with minor inaccuracies also in GE and EE.

category imprint: Differences between sources

issues: Inaccuracies in GE , EE inaccuracies

b. 9

composition: Op. 10 No 4, Etude in C♯ minor

Additional g1 in AI

No g1 in FE (→GE,EE)

..

In the version prepared for print Chopin resigned from g1 at the beginning of the bar.

category imprint: Differences between sources; Corrections & alterations