FC
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All autographs include a short d2 grace note. F does not have a grace note in this place - it results from a different ending of the melodic motif in bars 15 and 16.
In CX and CY, the grace note is not slashed - it may be a copying inaccuracy.
In AK, the natural next to the grace note was written clearly lower, in the 3rd space.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Accidental below/above the note
notation: Ornaments