C. Julius Caesar, Gallic War

When it was reported to Caesar that they were attempting to make their route through our Province he hastens to set out from the city, and, by as great marches as he can, proceeds to Further Gaul, and arrives at Geneva. He orders the whole Province [to furnish] as great a number of soldiers as possible, as there was in all only one legion in Further Gaul: he orders the bridge at Geneva to be broken down. When the Helvetii are apprized of his arrival they send to him, as embassadors, the most illustrious men of their state (in which embassy Numeius and Verudoctius held the chief place), to say "that it was their intention to march through the Province without doing any harm, because they had" [according to their own representations,] "no other route: that they requested, they might be allowed to do so with his consent." Caesar, inasmuch as he kept in remembrance that Lucius Cassius, the consul, had been slain, and his army routed and made to pass under the yoke by the Helvetii, did not think that [their request] ought to be granted: nor was he of opinion that men of hostile disposition, if an opportunity of marching through the Province were given them, would abstain from outrage and mischief. Yet, in order that a period might intervene, until the soldiers whom he had ordered [to be furnished] should assemble, he replied to the ambassadors, that he would take time to deliberate; if they wanted any thing, they might return on the day before the ides of April [on April 12th].