Book 14
11.6
After this the next thing was to summon Caesar and induce him to make equal haste, and in order to remove suspicion, Constantius with many feigned endearments urged his sister, the Caesar’s wife, at last to satisfy his longing and visit him. And although she hesitated, through fear of her brother’s habitual cruelty, yet she set forth, hoping that, since he was her own brother, she might be able to pacify him. But after she had entered Bithynia, at the station called Caeni Gallicani, she was carried off by a sudden attack of fever. After her death the Caesar, considering that the support on which he thought he could rely had failed him, hesitated in anxious deliberation what to do.
11.7
For in the midst of his embarrassments and troubles his anxious mind dwelt on this one thought, that Constantius, who measured everything by the standard of his own opinion, was not one to accept any excuse or pardon mistakes; but, being especially inclined to the ruin of his kin, would secretly set a snare for him and punish him with death, if he caught him off his guard.