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b. 31

composition: Op. 28 No. 24, Prelude in D minor

F in A (→FEEE)

D in FC (→GE)

..

The absence of visible corrections in FC proves Fontana's mistake. Had Chopin wanted to repeat in this bar the figures from the preceding one, he would have certainly marked it in an abridged manner with a / mark. According to us, the mistake is rather a result of copying the version of the preceding bar than a typical Terzverschreibung error, since the main condition for such a mistake is not met: the notes surrounded by a few parallel lines do not share a graphical resemblance – F is below the stave, whereas D under a ledger line, added and short (see, however, b. 72).

category imprint: Differences between sources

issues: Terzverschreibung error , Errors of FC

b. 32

composition: Op. 28 No. 24, Prelude in D minor

..

In the final part of the roulade (starting from c2), there are no accidentals in A (→FE). The patent inaccuracy was corrected in FC (→GE) and EE by adding the necessary naturals before b2 and b3.

category imprint: Interpretations within context; Differences between sources

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

b. 34-36

composition: Op. 28 No. 24, Prelude in D minor

..

A (→FE) is missing accidentals before the quavers ending the first L.H. figures in b. 34 and 36. The necessary sharps raising f to f were added in FC (→GE) and EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Omission of current key accidentals , Fontana's revisions , Inaccuracies in A , Errors repeated in FE

b. 35

composition: Op. 28 No. 24, Prelude in D minor

..

There is no  raising b1 to b1 in A (→FC,FE). The patent inadvertence was corrected in GE and EE.

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. 36

composition: Op. 28 No. 24, Prelude in D minor

..

In A (→FE) there is no  before the last note of the roulade, raising d4 to d4. That inaccuracy, typical of Chopin, was corrected in FC (→GE) and EE. However, in FC the added  covered the small notehead, as a result of which GE1 interpreted the note as a small protuberance on a ledger line below that note, which resulted in c4. The mistake, patent in this harmonic context, was corrected in GE2 (→GE3).

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , GE revisions , Inaccuracies in FC , Fontana's revisions , Inaccuracies in A , Errors repeated in FE