The chord with c
2, although completely possible from the harmonic point of view, is, however, most probably a result of Chopin's mistake, as the d
-f-a-c (a-c-e-g) diminished four-note-chord introduces the B minor key, which Chopin indicated with an enharmonic change in the previous bar. In this context, an omission of a 
is highly likely – cf. the note in bar 56. The natural added – probably by Chopin – in FE3 (→FE4) is, therefore, probably a correction of a mistake.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources; Corrections & alterations
issues: EE revisions, Errors in FE, GE revisions, Omission of current key accidentals, Authentic corrections of FE, Last key signature sign, Errors of GC
notation: Pitch