AG
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b. 38
The autographs and the majority of the copies feature f-d1 sixths on the 2nd and 3rd beat in the L.H. The F sources, on the contrary, feature triads in this place: FC - doubly repeated f-a-d1, whereas in PE, FEF and GEF the second chord is e-g-d1. The L.H. in bar 22 looks the same. Additionally, the first beat in the L.H. in FC is extended - the bottom voice, B - to a minim, whereas in PE, FEF and GEF - to a dotted minim.
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See b. 22
category imprint: Differences between sources
notation: Pitch