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b. 8

composition: Op. 28 No. 18, Prelude in F minor

e & e1 in A (→FE,FCGE), literal reading

e & e1 in EE

..

According to us, the missing accidental before the penultimate note in the roulade is almost certainly Chopin's error, one of his most frequent mistakes. It is supported by similar melodic phrases in other places in the Prelude, e.g. in b. 4-5 (b at the beginning of b. 5) or an octave higher in the discussed bar (the 10th semiquaver, e). Cf. the note in the Prelude in C minor, Op. 28 No. 20, b. 3.

category imprint: Differences between sources

issues: EE revisions , Omissions to cancel alteration , Errors of A

b. 8

composition: Op. 28 No. 18, Prelude in F minor

Semiquavers in A (→FC,FEEE1)

Demisemiquavers in GE & EE2

..

The change of the number of beams introduced by GE is wrong – in a  bar, it is groups including at least 32 notes (but less than 64) that should be written as demisemiquavers. In this situation, the fact that this mistake was repeated in EE2 is puzzling.

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 8

composition: Op. 28 No. 18, Prelude in F minor

..

In A (→FE), Chopin wrote only a  restoring e2 (in the R.H. part). The corresponding sign in the L.H. part was added in FC (→GE) and EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Fontana's revisions , Inaccuracies in A , Errors repeated in FE

b. 9

composition: Op. 28 No. 18, Prelude in F minor

..

An additional note in the 3rd L.H. quaver was deleted in A – F or G (less probable).

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Accompaniment changes

b. 9-10

composition: Op. 28 No. 18, Prelude in F minor

2 wedges in A (→FC), literal reading

Dot & 2 wedges in FE (→EE)

2 dots in GE

4 wedges suggested by the editors

..

A (→FC) feature distinct wedges above the R.H. chords. With the layout of the manusripts – lower notes of the R.H. chords wirtten on the lower staff – those marks pertain certainly to both hands, hence we also add wedges below the L.H. octaves. This solution was adopted already in FE (→EE), although only in bar 10. EE (→EE) in bar 9 and GE in both bars reproduce the mark as a staccato dot (in the R.H. only).
Similarly in bars 11-12.

category imprint: Differences between sources; Editorial revisions

issues: Inaccuracies in GE , Inaccuracies in FE , FE revisions , Wedges