Interpretation of the written in pencil ending of the Etude is impeded in AI by limited resolution of the preserved photography. Originally, the piece ends in bar 48: 
. Chopin then added in pencil an additional bar, yet interpretation of the details of the part of the L.H., which seems to be edited differently than in A and editions, is not entirely certain.
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category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations
issues: Changed phrase length
notation: Pitch