The deletions visible in A in these bars and empty space after the most probably erased g
1 note under the a2 quaver in b. 121, which was initially most probably a g2 (it did not have a ledger line that would cross it), reveal that initially the 2nd half of b. 120 and the 1st half of b. 121 were analogous to b. 118-119: 
. The missing mordent in this version allows us to imagine two scenarios of the changes:
- the idea to diversify b. 120-121 with respect to b. 118-119 came to Chopin when he was just about to write a mordent in the initial version of b. 121;
- initially, there were no mordents in both places; it was only the melodically developed version of b. 120-121 that prompted Chopin to add an ornament 2 bars earlier.
Compare the passage in the sources »
category imprint: Corrections & alterations; Source & stylistic information
issues: Corrections in A, Deletions in A, Main-line changes
notation: Rhythm