Op. 2, Variations in B♭ major
Op. 10, 12 Etudes
Op. 11, Concerto in E minor
Op. 21, Concerto in F minor
Op. 22, Polonaise in E♭ major
Op. 24, 4 Mazurkas
Op. 25, 12 Etudes
Op. 26, 2 Polonaises
Op. 27, 2 Nocturnes
Op. 28, 24 Preludes
Op. 30, 4 Mazurkas
Op. 35, Sonata in B♭ minor
Op. 50, 3 Mazurkas
Op. 63, 3 Mazurkas
Op. 64, 3 Waltzes
Op. 21, Concerto in F minor, Mvt II
The 
returning e
3 in the descending fragment of the roulade is absent in all sources, which is undoubtedly Chopin's mistake. EE added flats restoring e2 and d2 at the end of the bar – an addition justified in the original notation with the use of an octave sign in the uppermost fragment of the roulade.
Compare the passage in the sources »
category imprint: Interpretations within context; Editorial revisions
issues: EE revisions, Omissions to cancel alteration
notation: Pitch
