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b. 81-83

composition: Op. 19, Bolero

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GE does not have a cautionary  before e2, the 2nd note in bars 81 and 83. The signs were most probably added in the last proofreading of FE (→EE), perhaps on Chopin's initiative.

category imprint: Differences between sources

issues: Cautionary accidentals , Authentic corrections of FE

b. 87

composition: Op. 19, Bolero

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The cautionary naturals before the first two demisemiquavers were probably added in the last phase of proofreading of FE (→EE), for they are absent in GE.

category imprint: Differences between sources

issues: FE revisions

b. 107

composition: Op. 19, Bolero

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In GE, there is no cautionary  before a1. It was most probably added in the last phase of proofreading of FE (→EE). Similarly, in bar 219.

category imprint: Differences between sources

issues: FE revisions

b. 117

composition: Op. 19, Bolero

..

In GE, there is no cautionary  before c1. It was most probably added in the last phase of proofreading of FE (→EE). Similarly, in bar 229.

category imprint: Differences between sources

issues: FE revisions

b. 131

composition: Op. 19, Bolero

No a in EE1 (→EE2)

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In EE1 (→EE2), the engraver overlooked the notes in the chords on the 3rd and 4th semiquavers in the bar. The mistake was rectified in EE3.

category imprint: Differences between sources

issues: EE revisions , Errors in EE