Today's piece for sight-reading is Fugue Grave (p. 4) from 5 Fugues et un Quatuor sur le Kyrie (1689) by Jean-Henry d'Anglebert (1629-1691). It's a four-voice fugue in the French tradition which normally didn't have any circle of fifth sequences. If you want to play the ornaments the right way, look at page 3 of this edition, where you will find the table of ornaments and their execution.
As I played it this afternoon, I noticed right away that the most difficult ornaments to execute are in the middle parts (alto and tenor). The outer part (soprano and bass) are not easy, either.
As you are focusing on these ornaments, don't forget to use articulate legato as people tend to forget it in difficult situations. Beginners can practice separate parts of this fugue.