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b. 39-46

composition: Op. 35, Sonata in B♭ minor, Mvt IV

..

The return of the initial fragment of the piece is marked in GC in an abbreviated manner with empty bars, numerated from 1 to 10, which undoubtedly corresponds to the notation of [A]. Repetition of 10 bars is either the original version or – which, according to us, is more likely – Chopin's mistake.

category imprint: Source & stylistic information

issues: Abbreviated notation of A

b. 39

composition: Op. 35, Sonata in B♭ minor, Mvt IV

..

FE1 has an erroneous a as the 8th quaver in the R.H.

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , FE revisions

b. 40

composition: Op. 35, Sonata in B♭ minor, Mvt IV

..

FE1 (→FE2) has an erroneous as the last quaver in the L.H. The mistake was corrected both in the proofreading of FE3 (→FE4FE5) and in the base text to EE. 

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , FE revisions

b. 42

composition: Op. 35, Sonata in B♭ minor, Mvt IV

..

FE1 (→FE2) has an erroneous e as the 7th quaver in the L.H. The mistake was corrected both in the proofreading of FE3 (→FE4FE5) and in the base text to EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , FE revisions

b. 46

composition: Op. 35, Sonata in B♭ minor, Mvt IV

10 bars in GC (→GE) & FE1 (→FE2)

8 bars in EE, FE3 (→FE4) & FESch

..

Between bars 46 and 47, GC (→GE) and FE1 (→FE2) include another two bars, identical to bars 9-10. It is probably a result of a mistake at the time of performing an abbreviated marking of bar 39 and following with numerals as repetitions of the respective bars of the beginning – Chopin marked 10 bars in this way instead of eight. The composer removed the superfluous bars in the proofreading of FE3 and in the base text to EE, he also deleted them in FESch and two (according to Mikuli) pupil's copies, belonging to Fryderyka Streicher and Marcelina Czartoryska. 

category imprint: Differences between sources; Corrections & alterations

issues: Annotations in teaching copies , Errors of A , Authentic corrections of FE , Authentic corrections of EE , Changed phrase length , Annotations in FESch