Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 36

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

..

The pairs of sharps raising d2(3)-f2(3) to d2(3)-f2(3) are missing in the 2nd half of the passage in A (→FC,FE). (The mark before the last quaver is also missing, which we discuss separately – see the next note). The inaccuracy, generally typical of Chopin, and particularly of the Preludes, 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. 37

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

No mark in A (→FCGE) & EE

Short accent in FE

Long accent, our alternative suggestion

..

The accent in FE, unless the engraver confused this bar with the next one, was added at the stage of proofreading (carried out by Fontana). Therefore, its authenticity is dubious; we omit it in the main text. However, if we were to admit that it could have come from Chopin, it would probably be a long accent, like the next two.  

category imprint: Differences between sources; Editorial revisions

issues: FE revisions

b. 37

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

..

The  raising b to b, overlooked in A, was added already in FC (→GE) and FE (→EE).

category imprint: Interpretations within context; Differences between sources

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

b. 38

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

..

In A one can see that the last g1 note was initially a quaver. Chopin then replaced it with a semiquaver and added a rest before it. See also b. 40.

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Main-line changes

b. 38

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

..

The last note in the 1st L.H. figure was probably written down as g in A, which Chopin then turned to b; eventually, he crossed it out and rewrote b. As is the case with many similar situations, it is not preceded by a , which was corrected in FC (→GE) and EE.

category imprint: Interpretations within context; Differences between sources; Corrections & alterations; Source & stylistic information

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