In the sources the naturals to a2, e2 and a1 are missing. This patent inaccuracy is partly due to the conviction that accidentals at a given pitch are valid regardless of the presence or absence of an octave sign.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Errors in FE, Accidentals in different octaves, Errors repeated in GE, Errors repeated in EE
notation: Pitch