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. 25 No 11, Etude in A minor
In GC the 
indication was initially written – with the copyist's hand – further, before the 3rd beat of the bar and under the bottom stave. Chopin moved it before the first f-f1 octave, which we reproduced in the main text.
Compare the passage in the sources »
category imprint: Corrections & alterations; Source & stylistic information
issues: Authentic corrections in GC
notation: Verbal indications