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b. 4

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

No marking in AI

in FE (→GE,EE)

category imprint: Differences between sources

b. 4

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

 in AI

No sign in FE (→GE,EE)

..

The hairpin in AI is an original marking, substituted by cresc. in bar 1 in the version intended for publication.

category imprint: Differences between sources

b. 4

composition: Op. 25 No 1, Etude in A♭ major

 in AI

No markings in A (→GE), FE & EE

..

The pedal change written in AI was overlooked in A. Cf. bar 1.

category imprint: Differences between sources; Corrections & alterations

b. 4

composition: Op. 25 No 1, Etude in A♭ major

No signs in CDP & EE

Accent &  in AI

 in A

 in GE1

  in FE & GE1a (→GE2)

 in GE3

..

In the main text we give a pair of   hairpins, being a result of Chopin proofreading of GE1a (→GE2); it is also FE that has identical indications. Hence Chopin returned – in a modified form – to the original idea written in AI. The abbreviated sign of GE1 is an attempt to interpret a not entirely clear notation of A; another attempt was made in GE3, ignoring the authentic proofreading of GE1a.

category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations

issues: GE revisions , Authentic corrections of GE , Unclear hairpins in A

b. 4

composition: Op. 25 No 2, Etude in F minor

..

In AW, GC, FE and EE1 (→EE2), there is no  returning b2. This characteristic for Chopin mistake was corrected in the remaining sources. In the repetition of this phrase in bar 23 the error appears only in AW, in which the repetition is not written with notes.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Omissions to cancel alteration , GE revisions