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b. 256-257

composition: Op. 19, Bolero

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In FE, there are visible traces of removal of superfluous cautionary  next to all bin bars 256 and 257. The signs were probably removed in the first proofreading of FE, since they are absent both in GE and EE (cf. bars 254-255).

category imprint: Source & stylistic information

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

b. 256-260

composition: Op. 21, Concerto in F minor, Mvt III

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In the part of the L.H. neither the clef was changed to the treble one in bar 256 nor the bass clef returned at the end of bar 260 in A. These patent oversights – particularly taking into account the orchestral part of Morch with the constantly held G major chord – were corrected already in GE1 (→FEEE, →GE2).
The treble clef written in pencil in bar 256 is probably a later, foreign addition – cf. a similar situation in the 2nd mov. of the Concertobar 50

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Errors of A

b. 256-259

composition: Op. 16, Rondo in E♭ major

1 slur in FE (→GE)

No slur in EE1

4 slurs in EE2 (→EE3)

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In EE1, there is no slur in the R.H. in bars 256-259 (even though there is its ending in bar 260). The reviser of EE2 (→EE3) arbitrarily corrected that mistake by introducing four one-bar slurs. 

category imprint: Differences between sources

issues: EE revisions , Errors in EE

b. 256

composition: Op. 16, Rondo in E♭ major

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In GE, the engraver overlooked the  raising a​​​​​​​3 to a3.

category imprint: Differences between sources

issues: Accidentals in different octaves , Inaccuracies in GE

b. 256-257

composition: Op. 11, Concerto in E minor, Mvt III

FE (→GE,EE)

FEH, literal reading

FEH, contextual interpretation

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The octave sign added in FEH most probably defines an authentic variant. According to us, it is much more likely that it was meant to move the entire figure of both hands by an octave, and not only of the R.H. 

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

issues: Annotations in teaching copies , Authentic post-publication changes and variants , Annotations in FEH