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Source:
p. 5, b. 123-144
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In FEH, there is an added cautionary 
before d
1 on the 2nd quaver in the L.H. It is difficult to determine what the motivation of the person adding that accidental was, since nothing suggests here a possibility of a mode change, whereas the last alteration of d took place more than 80 bars earlier.
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category imprint: Differences between sources; Source & stylistic information
issues: Annotations in teaching copies, Annotations in FEH
notation: Pitch
Missing markers on sources:
FE1, FED, FEH, FEJ, FES, GE1, GE2, GE3, EE1, EE2, EE3, GE2a, FEFo