Ammianus Marcellinus Res Gestae 20.4.18

[18] But since he insisted that at the time of his first auspices it was not fitting for him to wear a woman’s adornment, they looked about for a horse’s trapping, so that being crowned with it he might display at least some obscure token of a loftier station. But when he declared that this also was shameful, a man called Maurus, afterwards a count and defeated at the pass of Succi, ¹ but then a standard-bearer ² of the Petulantes, took off the neck-chain which he wore as carrier of the dragon ³ and boldly placed it on Julian’s head. He, driven to the extremity of compulsion, and perceiving that he could not avoid imminent danger if he persisted in his resistance, promised each man five gold pieces ⁴ and a pound of silver.