Both in b. 11 and 19, the grace notes in A (→FE→EE) are non-slashed, whereas in FC (→GE) – slashed. It is an inaccuracy that would often happen to Fontana-copyist, in this case almost certainly contrary to the intention of Chopin. The Chopinesque entries in FED equate the grace note and the crotchet with two quavers, which can be considered one of the performance possibilities of these motifs. We recommend a slightly shorter grace note, which could be written down as 
.
We give the variants resulting from the above differences of notation in the notes to b. 10-11 and 18-19.
category imprint: Differences between sources; Source & stylistic information
issues: Annotations in teaching copies, Annotations in FED, Non-slashed grace notes, Fontana's revisions
notation: Ornaments