The Roman History · Amm. 23.6.20

Within this circuit is Adiabene, which was formerly called Assyria, but by long custom has received its present name from the circumstance, that being placed between the two navigable rivers the Ona and the Tigris, it can never be approached by fording; for in Greek we use διαβαίνειν for to "cross:" this was the belief of the ancients.

Ammianus Marcellinus · translated by C. D. Yonge · 1911 reprint
C. D. Yonge translation (preface dated February 1862); G. Bell and Sons, 1911; Project Gutenberg #28587
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