A includes a 
before the 2nd quaver in bar 57. It means that – in spite of overseeing respective naturals in bars 58-59 – in the entire four-bar section Chopin heard a d2. The version was passed to GE through a proof copy of FE, where the missing naturals were added. While proofreading FE for the second time, Chopin changed the in bar 57 to a 
, hence lowering the top most sounds in bars 57-60 to d
2 (the version is present also in As, interpreted literally, in which there are no signs before these notes). A change of the part of the L.H. in bar 60 (see the note to this bar), introduced in GE, probably coming from Chopin, allows to suggest that also the naturals added in bars 58-59 may come from Chopin. Therefore, in the main text we give the version of A and GE, considering the differentiation introduced in FE (→EE) to be an equal variant.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources; Corrections & alterations
issues: Omission of current key accidentals, Authentic corrections of FE, Authentic corrections of GE, Inaccuracies in A
notation: Pitch