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b. 127-129

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

c1 only in chord in b. 128 in FC

4 notes c1 in chords in FE (→EE) & GE2

No c1 in chords in GE1

..

The three-note chords present in FE (→EE) are much more likely here, since they prepare and open the chordal sequence in bars 129-132. The FC version almost certainly resulted from the copyist's carelessness, who did not take care of the visibility of the notes written on the ledger line. This is indicated by the notation of the first two chords in bar 129, in which it is also the e1 notes that are practically imperceptible, although their presence is unquestionable. In GE1 it was also c1 in bar 128 that was overlooked, in spite of the presence of this note having been marked in FC. The notes overlooked in GE1 were added in GE2, perhaps on the basis of a comparison with FE.

category imprint: Differences between sources

issues: GE revisions , Uncertain notes on ledger lines , Errors of FC

b. 128-131

composition: Op. 43, Tarantella

FC3 (→FEIE)

A, GE

..

In FC3 (→FEIE) as well as in our proposed version the slur extends over to b. 131. In A and GE the slur ends before the end of b. 130, while in EE it ends on the third note in RH in b. 131.

category imprint: Differences between sources

issues: Inaccurate slurs in A

b. 128

composition: Op. 24 No. 4, Mazurka in B♭ minor

A very probable long accent in A

 No accent mark in GE1 (→FEEE)

Possibly a short accent in A (→GE2GE3)

..

The type of accent used by Chopin in A is not quite obvious, yet both its shape and the comparison with analogous bars (120 and 122) clearly point to a long accent. In GE1 (→FEEE) the accent was omitted and in GE2 (→GE3) a short one was added. 

category imprint: Graphic ambiguousness; Differences between sources

issues: Long accents , Errors in GE

b. 128

composition: Op. 24 No. 4, Mazurka in B♭ minor

A probable short accent in A (→GEFEEE)

A possible long accent in A

..

The accent mark in A is short, yet it does not differ much from the other two accents in bars 127-128 that are most probably long ones. However, a comparison with analogous bars 120, 122 and 134 convincingly suggests a short accent here. 

category imprint: Graphic ambiguousness; Differences between sources

issues: Long accents

b. 128

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

g2-c3 in GC (→GE), FE3 (→FE4), FESch & EE2

g2-e3 in FE1 (→FE2EE1)

..

The version with e3 present in FE1 (→FE2EE1) (in both FE without the necessary  in this situation) is almost certainly erroneous. It is proved by: c3 written in GC (→GE) and the Chopinesque corrections in FESch and FE3 (→FE4). The correct version with c3 is written inaccurately in some of the sources – the necessary  is only in GE and EE2. Further omissions of accidentals – see the adjacent note.

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , EE revisions , Accidentals in different octaves , Inaccuracies in FE , Terzverschreibung error , GE revisions , Omission of current key accidentals , Authentic corrections of FE , Inaccuracies in GC , Annotations in FESch