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b. 69

composition: Op. 63 No. 3, Mazurka in C# minor

..

In FE1 the crotchet on the 1st beat of the bar in the R.H. is a f1, not g1This patent mistake in the theme melody was corrected already in FE2 (→EEW) and in GE (irrespectively).

category imprint: Differences between sources

issues: Errors in FE , GE revisions , FE revisions

b. 72

composition: Op. 63 No. 3, Mazurka in C# minor

g-c1-e1 in FE1 (→GE)

g-c1-g1 in FE2 (→EEW)

..

The change of e1 to g1 in the chord on the 2nd beat of the bar, introduced in the stage of proofreading FE2 (→EEW), bears traces of a Chopinesque improvement – it eliminates the parallel resolution of a doubled leading e1-e2 note to f1-f2 in the next bar.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE

b. 75

composition: Op. 63 No. 3, Mazurka in C# minor

..

In GE there is no  restoring f on the 3rd beat of the bar. The patent mistake was committed already in FE1 (or perhaps even earlier, in [A]), which is supported by the fact that no space for this accidental was provided for in FE. As it is already in FE1 (→FE2EEW), it must have been added in the last stage of proofreading this edition.  

category imprint: Interpretations within context; Differences between sources

issues: Authentic corrections of FE , Errors repeated in GE