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b. 91

composition: Op. 50 No. 2, Mazurka in A♭ major

..

Just like in b. 16, in the main text we add cautionary flats before e2 and e1. The latter was added already in the proofreading of FE (→EE).

category imprint: Differences between sources; Corrections & alterations

issues: Cautionary accidentals , FE revisions

b. 100

composition: Op. 50 No. 2, Mazurka in A♭ major

..

Just like in b. 25, in the main text we include the cautionary  before e1 featured in GE and added in the first stage of proofreading of FE (→EE).

category imprint: Differences between sources; Corrections & alterations

issues: Cautionary accidentals , FE revisions