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b. 7-15

composition: Op. 63 No. 1, Mazurka in B major

..

In bars 7 and 15 the sources do not contain sharps over the mordents. There are no doubts as to the sound of the top note, while the notation is inaccurate, as usual in such situations in Chopin's works (in bar 7 it concerns only AI and GE3 due to the misplaced  mark in the remaining sources). In the versions 'edited text' and in the main text we add the absent accidentals.
There is a similar situation in bar 75.

category imprint: Interpretations within context

issues: Errors in FE , Accidentals in different octaves , GE revisions , Errors repeated in GE , Errors repeated in EE

b. 7

composition: Op. 2, Variation IV, primitive version

e1-c1 in AsI

c1-a in A

..

In the 1st half of the bar, the L.H. part bears traces of corrections in AsI. While working on this manuscript, the initial version:  was ultimately replaced by the one we give in our transcription. Chopin then once more changed the 2nd and 3rd hemidemisemiquavers in the 1st figure of the bar; in A he returned to the initial version. 

category imprint: Differences between sources; Corrections & alterations

issues: Chopin's hesitations , Accompaniment changes , Corrections of AI

b. 7

composition: Op. 2, Variation IV, primitive version

Arpeggios from a1 in AsI

Arpeggios from c2 in A

..

As in bars 1-2 and 5-6, in AsI Chopin kept the position of the hemidemisemiquaver figures, in spite of the melody semiquavers, which are each time farther away. In the final version, he reduced the distance between the melody semiquavers and the preceding arpeggio-like figures. The same in bar 23. 

category imprint: Differences between sources; Corrections & alterations

issues: Accompaniment changes

b. 7-8

composition: Op. 63 No. 1, Mazurka in B major

Longer slur in AI

Short slur in FE (→GE,EE)

category imprint: Differences between sources; Corrections & alterations

issues: Corrections of AI

b. 7

composition: Op. 63 No. 1, Mazurka in B major

 in AI

No marking in FE (→GE,EE)

category imprint: Differences between sources; Corrections & alterations