As was the case with b. 24, in A (→FC,FE) there is not a single 
before the a notes (in various octaves). The accidentals were added in EE (all) and in GE (except a1 in b. 26 and a in b. 27).
See also bars 27-32.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, GE revisions, Omission of current key accidentals, Errors of A, Last key signature sign, Errors repeated in GE, Errors repeated in FE
notation: Pitch