Here ya go, and I’m posting another example though we don’t know how many pens have touched the piece in these 200+ years. — k
I tried those 2 examples. I’m no expert on ornamentation, but I’d say to use trills on all those + signs except the first note in the 2nd example (the f# at the beginning of the sample). You could use a 4-note turn (starts on the note above) or turned trill on it (going directly into the g; very sweet!). Phew, I rescued one, I think!