18. See in Ammianus (1. xiv. c. 1, 7) a very ample detail of
the cruelties of Gallus. His brother Julian (p. 272)
insinuates that a secret conspiracy had been formed against
him; and Zosimus names (1. ii. [c. 55] p. 135) the persons
engaged in it; a minister of considerable rank, and two
obscure agents, who were resolved to make their fortune.