Piano Forum

I have the Schrimer edition, with notes, fingerings and clarifications of the ornaments by Christopher Taylor, which is very similar to this, with a few differences: trills added between brackets indicating that it is a suggestion not present in the original score, at bars:

11, first voice over the second B
25, first voice over the long G
28, second voice, over the long A
30, first voice, over the F#, imitating the previous one
37, first voice over the B
53, first voice over the second E, imitating bar 11
58, first voice over the E.

Looking at Bach's manuscript I get a little confused about several details:

1. The last beat in bar 4, in the manuscript is written as a dotted semiquaver and a demisemiquaver, in every edition is written as 2 semiquavers.

2. The complete lack of turns in the manuscript.

3. The trills appearing between brackets as a suggestion, when in fact the trill appears in the original score.

4. The added B at bar 46 in most editions.

What is the cause of this differences? Did Bach revisit the score?