Res Gestae

Meanwhile, that the siege of Aquileia might not be interrupted, it was decided, since all the rest of their toil had come to nothing, to force a surrender of the vigorous defenders by thirst. And when the aqueducts had been cut off, but in spite of that they resisted with still greater confidence, with a mighty effort the river was turned from its course; but that also was done in vain. For when the means of drinking more greedily were diminished, men whom their own rashness had beleaguered lived frugally, and contented themselves with water from wells.