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b. 47-48

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

..

In CLI and FE (→GE1GE2GE3,→EE) there is no  in the last group of semiquavers in bar 47 and in the second one in bar 48. It is a result of other rules on accidentals than the ones adopted by us in this kind of situations.

category imprint: Source & stylistic information

issues: Accidentals in different octaves , GE revisions

b. 48

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

No sign in CLI & EE2

 in FE

 in GE & EE3 (→EE4)

..

We give  after FE, based on the manuscript and corrected by Chopin. In the remaining editions the sign was slightly shortened, while in EE2 it was omitted (cf. bars 71-78).

category imprint: Differences between sources

b. 48

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

g in CLI

in FE (→GE,EE

..

According to us, g in CLI is not an earlier version, yet a copyist's error, who routinely repeated the accidental of the previous figures. 

category imprint: Differences between sources

issues: Errors of CLI

b. 49-50

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

No marks in CLI & FE (→GE,EE2)

Accents in EE3 (→EE4)

..

In EE3 (→EE4) the accents were added according to bars 1-2.

category imprint: Differences between sources

issues: EE revisions

b. 51

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

No fingering in CLI & FE (→GE)

Fingering in EE

..

Chopin did not give here the fingering, as he probably thought that the one he wrote in analogous bar 3 was enough. Fontana, adding the fingering in EE, included both the authentic indications and his own alternative solution.

category imprint: Differences between sources

issues: EE revisions