Note 157
Ammianus, xxx. 10. Zosimus, 1. iv. [c. 19] p. 222, 223. Tillemont has proved (Hist. des Empereurs, tom. v. p. 707-709) that Gratian reigned in Italy, Africa, and Illyricum. I have endeavoured to express his authority over his brother's dominions, as he used it, in an ambiguous style.
The History Of The Decline and Fall Of The Roman Empire— Chapter 25