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b. 13

composition: Op. 42, Waltz in A♭ major

..

GE1 and EE have a cautionary  added next to a. The sign was removed in GE2 (→GE3). We also believe that this addition is unnecessary.

category imprint: Differences between sources

issues: EE revisions , GE revisions

b. 17

composition: Op. 42, Waltz in A♭ major

..

GE1 (→GE2GE3) has a superfluous cautionary  next to b1 in bar 15 and d2 in bar 17.

category imprint: Differences between sources

issues: GE revisions

b. 21

composition: Op. 42, Waltz in A♭ major

..

In FEG (→GE1) there are no accidentals in this bar. A comparison with analogous bars 13, 185 and 193 proves a mistake (probably of the engraver). The remaining sources added the necessary naturals raising D to D and d to d

category imprint: Differences between sources

issues: Errors in FE , GE revisions , Authentic corrections of FE , Authentic corrections of EE

b. 21

composition: Op. 42, Waltz in A♭ major

..

EE has a superfluous cautionary  next to a.

category imprint: Differences between sources

issues: EE revisions

b. 27-28

composition: Op. 42, Waltz in A♭ major

..

The cautionary  of din bar 27 occurs in the majority of the sources (the sign was removed only in GE3). It is probably a mistake, while the sign – completely redundant in this place – was supposed to be in bar 28, where it is justified. The  in bar 28 was added in GE1 (→GE2GE3).   

category imprint: Differences between sources

issues: Errors in FE , GE revisions , Cautionary accidentals