Note 110 It is presumptuous to controvert the opinion of Ammianus, a soldier and a spectator. Yet it is difficult to understand how the mountains of Corduene could extend over the plain of Assyria as low as the conflux of the Tigris and the Great Zab, or how an army of sixty thousand men could march one hundred miles in four days.

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The History Of The Decline and Fall Of The Roman Empire— Chapter 24