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b. 71

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

Octave in CLI

in FE (→GE,EE

..

The single note is an undeniable improvement introduced into FE (→GE,EE) – it refers to modifications in bars 69-70.

category imprint: Differences between sources

issues: Accompaniment changes

b. 71

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

b2 in CLI

g2 in FE (→GE,EE

..

bin CLI is almost certainly a mistake of the copyist who allegedly looked at the bar which is two bars behind this one and mistakenly wrote here the 3rd group of semiquavers from bar 69.

category imprint: Differences between sources

issues: Errors of CLI

b. 71

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

f2 in CLI

g2 in FE (→GE,EE

..

The version of CLI is the original one, drawn from [AI]. It is confirmed by the traces of deleting f2 visible in FE

category imprint: Differences between sources

issues: Main-line changes

b. 71

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

..

We add a cautionary  before g. The sign was already added in GE2 – and subsequent ones – and in EE4.  

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 71-78

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

No signs in CLI & EE2

  in FE (→GE) & EE3 (→EE4)

..

Four pairs of dynamic hairpins in FE (→GE) and EE3 (→EE4) are undoubtedly authentic. However, the reason they are missing in EE2 is not entirely clear, yet it seems plausible to assume that the engraver of EE worked in parts covering particular kinds of signs and, perhaps influenced by the lack of dynamic hairpins on the previous pages of the Etude, he omitted this stage also on this page. See also bars 69-70 and 76.

category imprint: Differences between sources

issues: Errors in EE