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p. 1, b. 1-13
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b. 2-6
In EE, slurs were added in the left hand in those bars. This is definitely the editor's revision that was supposed to emphasize that slurring was binding throughout the entire Nocturne. EE also introduced similar revisions in bars 16 & 31.
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category imprint: Differences between sources
issues: EE revisions
notation: Slurs