(1) in 
The compliance of the versions of GE and FE with each other proves that the version of EE is wrong. The engraver could have, e.g. confused the 1st beat of this bar with a similar respective fragment of the preceding one. However, an identical difference in analogous b. 122 is a strong argument against the possibility of a mistake – a mistake in the same place several dozen bars later seems extremely improbable. Due to the above reason, we consider a revision of EE to be more likely – the engraver, having added the overlooked naturals lowering c
(1) to c(1) in the previous bar, could have assumed that it was also here that a mistake could have been committed in FE, this time consisting in printing flats instead of naturals.
Compare the passage in the sources»
category imprint: Differences between sources
issues: EE revisions
notation: Pitch