It is difficult to say what Fontana's motivation was when he was providing 4 subsequent L.H. chords with staccato dots, which are absent in A. One of the possibilities is a misinterpretation of the notation of A – in b. 54-55 under the quaver flags one can see the protruding endings of the stems of the chords with typical, small hooks, which are a consequence of the act of writing: the hand moves to the place where the next element of notation will be written, but the pen is detached from the paper too late. The hooks constitute small protrusions that can be regarded as dots from a distance. GE reproduced only the first of those dots.
Compare the passage in the sources »
category imprint: Differences between sources
issues: Errors in GE, Fontana's revisions
notation: Articulation, Accents, Hairpins