Issues : Last key signature sign

b. 40-42

composition: Op. 10 No 4, Etude in C♯ minor

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In AI there are a few additional or unnecessarily repeated accidentals ( before a, the 11th note in the L.H. in bar 40 and  before f, the 11th note in bar 41), or totally unjustified ( before d2, the 6th note in bar 40 and before d, the 2nd note in bar 41). In FE (→EE,GE1GE1aGE2GE3) only  before f, the 11th note in bar 41 remained, first removed in GE4 (→GE5).

category imprint: Differences between sources; Source & stylistic information

issues: GE revisions , Last key signature sign