Appian of Alexandria Civil Wars 3.1.6

[6] While Antony was busy with these matters, Brutus and Cassius, seeing nobody among either the plebeians or the veterans inclined to be at peace with them, and considering that any other person might lay plots against them like that of Amatius, became distrustful of the fickleness of Antony, who now had an army under his command. Seeing that the republic was not confirmed by deeds, they suspected Antony for that reason also. They reposed most confidence in Decimus Brutus, who had three legions near by. They sent secretly to Trebonius in Asia and to Tillius in Bithynia, asking them to collect money quietly and to prepare an army. They were anxious to enter upon the government of the provinces assigned to them by Caesar, but as the time for doing so had not yet come, they thought that it would be indecorous for them to leave their service as city praetors unfinished, and that they should incur the suspicion of an undue longing for power over the provinces. They preferred, nevertheless, to spend the remainder of their year as private citizens somewhere, as a matter of necessity, rather than serve as praetors in the city where they were not safe, and were not held in honor corresponding to the benefits they had conferred upon their country. Being in this state of mind, and the Senate holding the same opinion as themselves, the latter gave them charge of the supply of corn for the city from all parts of the world until the time should arrive for them to take command of their provinces. This was done in order that Brutus and Cassius might not at any time seem to have fled. So great was the anxiety and regard for them that the Senate cared for the other murderers chiefly on their account. ¹