Res Gestae

Now Caesar, while wintering in Paris, hastened with the greatest diligence to forestall the Alamanni, who were not yet assembled in one body, but were all venturesome and cruel to the point of madness after the battle of Strasburg; and while waiting for the month of July, when the campaigns in Gaul begin, he was for a long time in much anxiety. For he could not leave until the grain supply was brought up from Aquitania during the mild summer season, after the breaking up of the cold weather and frost.