Ammian. xviii. 2. Libanius, Orat. x. p. 279, 280. Of these seven posts, four are at present towns of some consequence - Bingen, Andernach, Bonn, and Nuyss. The other three, Tricesimae, Quadriburgium, and Castra Herculis, or Heraclea, no longer subsist; but there is room to believe that, on the ground of Quadriburgium, the Dutch have constructed the fort of Schenk, a name so offensive to the fastidious delicacy of Boileau. See D'Anville, Notice de l'Ancienne Gaule, p. 183; Boileau, Epit re iv. and the notes.