at the beginning of the bar was written in Atut in place of the previous 
. The absence of a marking in FE (→GE,EE) means that the engraver of FE probably did not understand this correction, considering the mark written in bold font to be a deletion of . In the main text, we preserve the version of Atut, in which Chopin reviewed and corrected the dynamic markings – cf. e.g. bar 20 and 32.
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category imprint: Differences between sources; Corrections & alterations
issues: Errors in FE, Corrections in A, Errors resulting from corrections
notation: Verbal indications