There are no accidentals before the last R.H. octave in GC & FE1 (→FE2→EE1). The necessary 
restoring c1 was added while correcting FE3 (→FE4). In GE and EE2 naturals were added before both notes of the octave.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources; Editorial revisions
issues: EE revisions, Omissions to cancel alteration, GE revisions, Authentic corrections of FE, Errors repeated in EE
notation: Pitch