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b. 10-12

composition: Op. 28 No. 22, Prelude in G minor

Slurs in A (→FC)

No slurs in FE (→EE1)

Slurs in GE

Slurs in EE2

..

The missing slur in b. 10-11 and the slur in b. 12 in FE (→EE1) must be oversights of the engraver. The earlier starting point of the slur in b. 10 in GE is probably a result of the notation of FC, in which the beginning of that slur may suggest such an interpretation (Fontana probably took the bottom arm of the accent/diminuendo in A for the beginning of the slur). In EE2 the slurs were added probably after GE (in b. 10 inaccurately).
See also the next note.

category imprint: Differences between sources

issues: EE revisions , Errors in FE , Inaccuracies in GE

b. 11-12

composition: Op. 28 No. 22, Prelude in G minor

Slur in A (→FC,FE)

Slur in GE

No slur in EE1

Slur in EE2

..

In the main text we give the slur of A (→FC,FE). The earlier starting point of the slur in GE is an inaccuracy of the engraver, similar to the one in the previous bar. EE1 overlooked the slur (like the two adjacent ones), which was arbitrarily completed in EE2.

category imprint: Differences between sources

issues: EE revisions , Inaccuracies in GE , Errors in EE

b. 14

composition: Op. 28 No. 22, Prelude in G minor

..

A (→FC,FE) has no  lowering a1 to a1. The obvious inaccuracy was corrected in GE and EE.
FE overlooked  lowering d to d. EE corrected the mistake.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , GE revisions , Inaccuracies in A , Errors repeated in FE

b. 14

composition: Op. 28 No. 22, Prelude in G minor

..

In the main text we add cautionary naturals to the c-c1 octave, and the d2 in the R.H. The naturals in the L.H. were also added in GE and EE2.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 15

composition: Op. 28 No. 22, Prelude in G minor

Slur to 4th quaver in A

Whole-bar slur in FC (→GE) & FE (→EE)

..

The slur in A, which initially reached the 5th quaver in the bar, was shortened by Chopin by one quaver. That correction was not taken into account both by Fontana and the engraver of FE – in FC and FE the slur encompasses the entire bar.

category imprint: Differences between sources; Corrections & alterations

issues: Inaccuracies in FE , Corrections in A , Inaccuracies in FC