CHAPTER XXI.
The impost called "Aerikon"-- Exactions authorised by Justinian--The property of John the Cappadocian confiscated--The farming of the taxes entrusted to salaried commissioners--Increased spoliation--Oath taken against venality--Increasing corruption of officials--The Thracians and Illyrians at first check the depredations of the Huns, Goths, and other barbarians, and then, in turn, take to plundering themselves..