FE1
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The slur, probably added by Chopin to the basis or in the stage of proofreading FE (→EE), most probably refers to the motifs of the middle voices – cf., e.g. b. 139-141 or 159-161. In the discussed place, the original layout does not allow for it to be placed closer to those motifs.
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category imprint: Differences between sources
notation: Slurs