A
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We preserve the cautionary 
before a2 in the 2nd chord of the bar, due to a
in the previous bar. However, Chopin most probably wrote it to cancel a
2, used in the original version of the notation of the 1st chord. In the main text we also add a cautionary before c.
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category imprint: Editorial revisions; Corrections & alterations
issues: Corrections in A, Cautionary accidentals
notation: Pitch