In each of b. 13-16 and 29-32, Chopin initially separated in A the 3rd and 5th semiquavers (b1-e
1 and g1-c1, respectively) as an additional voice consisting of a quaver and a semiquaver: 
. He then abandoned that voice; he crossed out the beam and the additional stem of the 5th semiquaver. However, he left the additional stem of the 3rd semiquaver; he even prolonged it over the crossed-out beam, which must have meant that the note should be a crotchet. The sense of such corrections was guessed neither by Fontana nor by the engraver of FE.
Compare the passage in the sources»
category imprint: Differences between sources; Corrections & alterations
issues: Errors in FE, Corrections in A, Errors resulting from corrections, Deletions in A, Accompaniment changes, Errors of FC
notation: Rhythm