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b. 45-46

composition: Op. 10 No 2, Etude in A minor

..

In FEcor (→FEGE,EE) Chopin added cautionary naturals before the last notes in these bars. According to us, in the adopted graphic layout, the natural in bar 45 is unnecessary. The manuscripts do not include these accidentals.

category imprint: Differences between sources

issues: Cautionary accidentals , Authentic corrections of FE

b. 46

composition: Op. 10 No 2, Etude in A minor

..

The sources differ in the number of octaves written in an abbreviated form with the use of 8: three in CLI, the 2nd and 3rd in Ap, 3rd in FE. Both in GE and EE the use of abbreviations was totally rejected.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Authentic corrections of FE , Abbreviated octaves' notation

b. 47

composition: Op. 10 No 2, Etude in A minor

..

In CLI the 7th semiquaver is written as d3.

category imprint: Differences between sources; Corrections & alterations

issues: Enharmonic corrections