The change of Vivace to Lento was introduced by Chopin in a proofreading of FE (→GE,EE). The tempo indication of this Etude is the most flagrant example of the change of concept in Chopin's pieces, although a few arguments prove that the actual deceleration of the tempo could have not been that significant as it is suggested by the transition from Vivace to Lento ma non troppo. Cf. bar 21.
Compare the passage in the sources »
category imprint: Differences between sources; Corrections & alterations
issues: Errors in EE, Errors in GE, Authentic corrections of FE
notation: Verbal indications