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The espress. indication (i.e. espressivo), present only in Amar and placed somehow instead of 
of the final version, suggests a performance of a slightly more distinct shape of the phrase (cf. bar 36). When performing the entire Sonata or Marche, such an interpretation can be, according to us, used in one out of two repetitions of these bars intended by Chopin (possibly also in bars 47-54). It can be also understood as an indication complementing the final dynamic indication.
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category imprint: Differences between sources; Corrections & alterations
notation: Verbal indications