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b. 14

composition: Op. 10 No 1, Etude in C major

No fingering in CLI & FE (→GE)

Fingering in EE

..

The fingering added by Fontana in EE is contrary to Chopin's indications in similar figures in bars 4, 18 and 20.

category imprint: Differences between sources

issues: EE revisions

b. 20

composition: Op. 10 No 1, Etude in C major

..

In CLI there is no cautionary  before the G1-G octave (written in an abbreviated form as G with 8).

category imprint: Source & stylistic information

issues: Cautionary accidentals

b. 22-23

composition: Op. 10 No 1, Etude in C major

No fingering in CLI

Fingering in FE (→GE)

Additional fingering in EE

..

In EE Fontana added alternative, inauthentic proposals to the fingering given in the main text of FE (→GE,EE), which was undoubtedly written by Chopin.

category imprint: Differences between sources

issues: EE revisions

b. 22

composition: Op. 10 No 1, Etude in C major

..

CLI has bas the 4th semiquaver in the R.H., which results from the logic of the figuration's structure. In FE1 there is a d3, put here by mistake and corrected by Chopin in a proofreading of FE2 (→EE) for b2. The erroneous note must have initially been present also in GE1, which is confirmed by visible traces of its deletion, however, eventually GE1 and all subsequent editions of GE also feature b2.

 

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , Terzverschreibung error , GE revisions , Authentic corrections of FE , Authentic corrections of GE

b. 23-24

composition: Op. 10 No 1, Etude in C major

in CLI

Octave in FE (→GE,EE)

..

According to us, lack of the bass' octave strengthening in CLI is not the original version, but rather the copyist's error (overseeing two 8s indicating lower octaves). Such abbreviated notation of the octaves in this place is included in FE (→GE). 

category imprint: Differences between sources; Source & stylistic information

issues: Abbreviated octaves' notation , Errors of CLI