In FE, the 8th and 10th semiquavers in the R.H. are a b
2. The harmonic and pianistic context point to patent mistakes, which were corrected in EE and GE3. In turn, in GE1 (→GE2), the 8th semiquaver was changed to a2, yet a 
before the 10th note was not added. The absence of corrections in the pupils' copies proves that the pupils most probably performed the correct text, perhaps without checking thoroughly the notation.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Errors in FE, Omissions to cancel alteration, GE revisions
notation: Pitch