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This Prelude and Fugue for organ has two ornaments in it, and those two ornaments, in the Urtext, are the same:

In the middle of the Prelude (please excuse the score markings, and the "lighter" had to do with the organ), and at the end of the Prelude (it's not a literal "rit"):

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You'll notice the ornaments in the upper right hand corners of the scanned images, which are not in Bach's guide of ornamentation... has anyone a clue on how to play these or knows more about the issue?

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1 Answer 1

They look very much like the second ornament on the bottom line of the guide (idem), and I have heard them played like that. Of course, they look shorter, like a combination of that "uphook" and the mordent. With this interpretation you could also play the first one as B-A#-G#-A#, especially if your tempo is faster. I think I prefer the more finalizing effect of the longer trill, though, especially at the end of the piece.

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