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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

..

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. 12

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

..

In A (→FC,FE1) there are no accidentals before the last semiquaver (in both hands), which, when interpreted literally, gives d1 and d. In FE2 was added, yet only in the R.H., where it is a cautionary accidental. GE and EE include naturals in both hands.

category imprint: Interpretations within context; Differences between sources

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

b. 12

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

..

In A (→FCGE) there are no naturals before d2 and b1, since Chopin considered the previous accidentals before d3 and b2 to be valid. In FE (→EE), in which the first part of the roulade was written without an octave sign, respective naturals were added.

category imprint: Differences between sources; Source & stylistic information

issues: Accidentals in different octaves , FE revisions