The Roman History · Amm. 17.12.3

They cover vast spaces in their movements, whether in pursuit or in retreat, their horses being swift and very manageable; and they lead with them one or sometimes two spare chargers apiece, in order that the change may keep up the strength of their cattle, and that their vigour may be preserved by alternations of rest.

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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