In the part of the L.H. in Atut, a 
is present only next to d
in the 1st octave. In FE, a was added next to the bottom note of this octave, while in the remaining editions, it was added also next to d1.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Accidentals in different octaves, GE revisions, Authentic corrections of FE, Inaccuracies in A
notation: Pitch