The A mark is a quite typical long accent, yet in GE it was clearly placed after the note and prolonged, which made it resemble a 
hairpin. Interestingly enough, none of the remaining editions reproduced it correctly:
- in FE it was moved over the minim and shortened, which resulted in a version that is surprisingly similar to the A notation,
- in EE it was omitted,
- in IE it was extended.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Long accents, Inaccuracies in GE, Scope of dynamic hairpins, Errors in EE, FE revisions,
notation: Articulation, Accents, Hairpins