sentences:  The largest group is correspondence of Flavius Cerialis, prefect of the ninth cohort of Batavians and that of his wife, Sulpicia Lepidina.Some correspondence may relate to civilian traders and contractors; for example Octavian, the writer of Tablet 343, is an entrepreneur dealing in wheat, hides and sinews, but this does not prove him to be a civilian.The best-known document is perhaps Tablet 291, written around AD 100 by Claudia Severa, the wife of the commander of a nearby fort, to Sulpicia Lepidina, inviting her to a birthday party.