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b. 4-5

composition: Op. 28 No. 21, Prelude in B♭ major

Slur from 2nd quaver to bar 5 in A (→FEEE)

Slur from first quaver to bar 5 in FC

Slur from first to 6th quaver in GE

..

In the main text we give the slur of A (→FEEE). The slur of FC starts a quaver earlier, whereas GE also moved its ending, which made it resemble the previous slurs, thus consolidating a distorted image of articulation of these figures – see the notes in b. 1-2 and 2-4.

category imprint: Differences between sources

issues: Inaccuracies in GE , Inaccuracies in FC

b. 4-5

composition: Op. 28 No. 21, Prelude in B♭ major

..

In the main text we include the fingering entered most probably by Chopin into FES. In addition to digits, there is also a mark implying that the e1 note should be performed by the R.H., which the notation of FE completely ignores, since the note was moved to the bottom stave. An analogous hint, in the form of an additional quaver flag pointing upwards, is also in FEJ. In the main text, in which we keep the original division of the text between the staves, we do not include those annotations, since they are superfluous.
See the previous note. 

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FES

b. 4

composition: Op. 28 No. 21, Prelude in B♭ major

Fingering digit written into FEJ

No teaching fingering

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FEJ

b. 4-5

composition: Op. 28 No. 20, Prelude in C minor

Continuous slur in A (literal reading→FEEE) & CGS

Separate slurs in A (contextual interpretation→FCGE), AB & ACh

..

The slurs of A between b. 4 and 5 are ambiguous – the slur in b. 4, which ends the line, clearly suggests continuation, which is not confirmed by the slur in b. 5. The four-bar structure of the Prelude, emphasized by the change of register and dynamics, makes us consider the ending of the slur in b. 4 to be inaccurate, which is confirmed by the notation of both later album autographs.

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccurate slurs in A , Uncertain slur continuation

b. 4

composition: Op. 28 No. 15, Prelude in D♭ major

Fingering written into FES

Fingering in FES, less certain reading

No teaching fingering

..

In FES there is a small, diagonal line before a distinct fingering digit (2), which may be interpreted as 1, which would then refer to the e grace note. We do not include that possibility in the main text, since the meaning of that line is uncertain (not all pencilled marks in the Chopinesque teaching copies are interpreted in a satisfactory way; there are also some that probably do not carry any meaning at all – they are random traces of gestures of a hand holding the pencil – see, e.g. the 4th line on this page of FES, b. 17-21).

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FES