Page:
Source:
p. 8, b. 194-221
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In the main text, we add a cautionary 
before f
3. The accidental was added only in GE3. Interestingly, FE includes a cautionary before f1 in the L.H., which was not repeated both in GE and EE1 (→EE2). The accidental may have been added in the last phase of proofreading, which would explain its absence in GE; in EE, it was overlooked or considered unnecessary (it was added in EE3).
Compare the passage in the sources»
category imprint: Differences between sources; Editorial revisions
issues: EE revisions, GE revisions, Cautionary accidentals, EE inaccuracies, Authentic corrections of FE
notation: Pitch
Missing markers on sources:
FE1, FED, FEH, FEJ, FES, GE1, GE2, GE3, EE1, EE2, EE3, GE2a, FEFo