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b. 47

composition: Op. 30 No. 4, Mazurka in C# minor

d2 in FC (→GE) & FED

b1 in FE (→EE)

..

The version of FE (→EE) must be erroneous (a typical Terzverschreibung), which is confirmed by the correction in FED, most probably coming from Chopin.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FED , Terzverschreibung error

b. 53-61

composition: Op. 30 No. 4, Mazurka in C# minor

..

As before, in GE and EE cautionary sharps were added to the top notes of the dominant chords in bars 53, 57, 59 and 61.

category imprint: Differences between sources

issues: GE revisions

b. 65

composition: Op. 30 No. 4, Mazurka in C# minor

Tied g1 in FC, $FE (→EE) & GE2

f1 in GE1

..

The version of GE1 must be a mistake, corrected in GE2.

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 66

composition: Op. 30 No. 4, Mazurka in C# minor

..

We add a cautionary  before b1 in the main text.

category imprint: Editorial revisions

b. 67

composition: Op. 30 No. 4, Mazurka in C# minor

..

The cautionary natural before e1 is to be found only in FC (→GE).

category imprint: Differences between sources

issues: Cautionary accidentals