The 
indication in bar 55 was added to FC by Chopin; 
in bar 57 most probably too. This means that the 3 different indications visible in FE were also added to a text devoid of markings, probably in the stage of proofreading. Given uncertainty on the chronology of the Chopinesque corrections in FC, the basis for FE and the very FE, in the main text we provide the version of the principal source, FC. It introduces dynamic contrast, so typical of this opus. Moreover, both versions are undoubtedly authentic and can be regarded as equal.
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category imprint: Differences between sources
issues: Authentic corrections of FE, Authentic corrections of FC
notation: Verbal indications