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b. 64

composition: Op. 24 No. 2, Mazurka in C major

Sixths in A (→GE)

A chord in GE (→EE)

..

Initially, the 2rd and the 3rd crotchet were e flat-a flat-c1 triads in A. Then Chopin erased both a flat notes and this was the version that appeared in GE. The note a flat reappears in FE (→EE), but only on the 2nd beat. This is probably the result of Chopin's correction in FE.

category imprint: Differences between sources; Corrections & alterations

issues: Corrections in A , Authentic corrections of FE

b. 65

composition: Op. 24 No. 2, Mazurka in C major

An accent in A (→GE2GE3)

No accent mark in GE1 (→FEEE)

..

The omission of the accent from GE1 (→FEEE) was probably accidental. The mistake was corrected in GE2 (→GE3). 

category imprint: Differences between sources; Corrections & alterations

issues: Errors in GE

b. 66

composition: Op. 24 No. 2, Mazurka in C major

 in A (→GE), EE3

No dynamic indication in FE (→EE1EE2)

..

The omission of  from FE (→EE1EE2) is an obvious oversight, corrected in EE3

category imprint: Differences between sources

issues: EE revisions , Errors in FE

b. 66-67

composition: Op. 24 No. 2, Mazurka in C major

The slur in  A

The slur in  GE (→FEEE)

..

The initial section of the slur in bar 67 (the bar that opens a new page in A) may suggest that the slur is continued from the previous page, but no slur begins in bar 66. Nonetheless, in GE (→FEEE) the slur is drawn from f2 in bar 66. Fortunately, this inaccuracy in reading A proved consistent with Chopin's later corrections of analogous slurs in bars 58-59 and 62-63.

category imprint: Graphic ambiguousness; Interpretations within context; Differences between sources

issues: Inaccurate slurs in A

b. 69

composition: Op. 24 No. 2, Mazurka in C major

The 2nd crotchet has the staccato articulation in A (→GE2GE3) and EE

No staccato sign in GE1 (→FE)

..

The staccato dot is missing in GE1 (→FE), which is certainly  an error. The dot was added again in EE and GE2 (→GE3).

category imprint: Differences between sources

issues: EE revisions , Inaccuracies in GE