Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Pitch
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


Pitch

b. 75

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

..

We add cautionary naturals before e2 and e-e1 in the main text.

category imprint: Editorial revisions

b. 77-78

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

..

In the main text we add cautionary accidentals – a  to f1 in bar 77 and a  to e1 in bar 78. The latter was added also in EE.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions

b. 82

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

..

We add a cautionary  before b1 in the main text. The accidental written by the revisor into FC was also added in GE.

category imprint: Differences between sources; Editorial revisions

issues: Foreign hand additions in manuscripts

b. 89

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

No c1 in chords in FC (→GE)

Chords with c1 in FE (→EE)

..

A comparison with analogous bar 73 suggests that the version of FC (→GE) is erroneous. It is likely that Fontana did not notice both c1 notes in the chords due to inaccurate notation – in Chopin's autographs, it can sometimes be difficult to determine the presence of notes on ledger lines in the middle of chords. A correction to FC (in print or of the basis) cannot be ruled out either.

category imprint: Differences between sources

issues: Authentic corrections of FE , Errors of FC

b. 93-94

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

..

In the main text we add cautionary accidentals – a  to f1 in bar 93 and a  to e1 in bar 94.

category imprint: Editorial revisions