Accidentals in A are to be found only before the first chord and a2-a3 on 5th quaver in R.H. All the necessary signs were added already in FE1, and repeated in the remaining editions (except for GE1 which overlooked 
next to a3).
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category imprint: Interpretations within context; Differences between sources
issues: Errors in GE, GE revisions, Omission of current key accidentals, Errors of A, FE revisions
notation: Pitch