Issues : Annotations in teaching copies

b. 16-18

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

Fingering written into FED

No teaching fingering

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED

b. 19

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

Crotchet g in A (→FC)

No crotchets in FE (→EE1) & GE

Crotchets g & a in FED, FES & EE2

..

The stem prolonging the g quaver was overlooked both in FE (→EE1) and GE). Chopin added it in FED and FES; moreover, in both copies he also prolonged the last a quaver. We consider that addition, most probably introduced independently in each of the copies, a development of the original idea and adopt it to the main text.
It remains a mystery how the reviser of EE2 found out about those prolonged notes. 

category imprint: Differences between sources

issues: Annotations in teaching copies , EE revisions , Errors in FE , Annotations in FED , Errors in GE , Annotations in FES

b. 21-22

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

No sign in A (→FCGE, →FEEE)

in FES

(), our variant suggestion

..

It is problematic to assess the range of the  hairpin entered into FES most probably by Chopin – the arms of the mark are clearly of a different length, which happened often to Chopin. According to us, it is the top arm that is reliable, probably written first, from right to left.

category imprint: Graphic ambiguousness; Differences between sources

issues: Annotations in teaching copies , Scope of dynamic hairpins , Annotations in FES

b. 21

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

No marking in A (→FCGE, →FEEE)

Slur in FES, possible interpretation

..

The pencilled mark written in FES over the L.H. part may be interpreted as a slur (the range of which would mimic the one of the slur in b. 81). However, it is uncertain whether it is a slur at all, hence we signalize this possibility as an alternative version only.

category imprint: Graphic ambiguousness; Source & stylistic information

issues: Annotations in teaching copies , Annotations in FES

b. 22

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

Fingering written into FED

No teaching fingering

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED