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b. 5

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

No fingering in CLI

Fingering in FE (→GE)

Additional fingering in EE

..

In the main text we give the undoubtedly authentic fingering of FE (→GE). In EE it was completed with a digit added by Fontana, which indicates a different fingering than the one by Chopin.

category imprint: Differences between sources

issues: EE revisions

b. 6-7

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

..

The sharp in front of fin bar 6 is present only in EE, while the  in front of ain bar 7 appears only in the later impressions and editions (EE4 and all GE,s except for GE1). Moreover, in CLI there is no  in front of f1 in bar 6. Those discrepancies does not influence the reading of the text, yet they result from the gradually specified rules governing the accidentals.

category imprint: Source & stylistic information

issues: EE revisions , Accidentals in different octaves , GE revisions

b. 7-12

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

Ties in CLI, GE & EE

No ties in FE

..

In FE there are no ties sustaining the upper notes of the octaves in bars 7-8, 9-10 and 11-12. According to us, the most probable explanation is a kind of misunderstanding at the time of changing the original brief notation of the octaves with the use of under the upper notes for regular notation. 

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , GE revisions , Abbreviated octaves' notation

b. 7

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

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The cautionary  in front of is absent in CLI and GE1. The lack of the sign in GE1 suggests that the sign was added only in the last proofreading of FE, which is confirmed by visible traces of introducing changes.

category imprint: Differences between sources

issues: Cautionary accidentals

b. 8

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

No mark in CLI & GE4 (→GE5)

Long accent in FE

Short accent in GE1 (→GE2GE3) & EE

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The accent sign in FE is clearly different than in bars 1-2. Most probably, according to Chopin's intentions, it was supposed to be a long accent. Both in GE and in EE it was rendered as a casual short accent. In GE4 (→GE5) the sign was omitted, which was probably a mistake.

category imprint: Graphic ambiguousness; Differences between sources

issues: Long accents , Errors in GE