Note 507 — Chapter XXX

So Curtius (vi. 6) makes the Don the boundary of Europe and Asia. “Tanais Europam et Asiam medius interfuit.” Ammianus says: “Tanais inter Caucasias oriens rupes, per sinuosos labitur circumflexus, Asiamque disterminans ab Europa, in stagnis Maeoticis delitescit.” The Rha, or Volga, is first mentioned by Ptolemy in the second century of the Christian era.