As a natural consequence of this entire or principal dependence of Rome on foreign or provincial raising of grain, there was, on any interruption of these foreign supplies, the greatest scarcity and even famine in the metropolis. All the vigilance of the emperors, which was constantly directed to this object, could not prevent this from taking place. Tacitus says, that in the scarcity under Claudius, there only remained a supply of fifteen days for the city.[12] Famine in Rome was frequent under Augustus, Tiberius, Claudius, and Nero. Claudian laments, that after Egypt had been assigned to Constantinople, Rome had come to derive its subsistence solely from Lybia, and depended on the _double_ chances of the seasons and the winds. ----"Nunquam secura futuri, Semper inops, ventique fidem poscebat et anni."[13] "When Africa revolted under Gildo, in the reign of Honorius, Rome," says Gibbon, "was on _the brink of starvation_, from which she was only saved by large importations _from Gaul_."[14] She still depended on her provinces; domestic agriculture was ruined. Claudian represents the genius of ancient Rome bewailing, in pathetic and eloquent terms, her dependence for food on the nations she had conquered, in words which all governments rendering their people dependent on foreign supplies would do well to bear in mind. "Formerly," says the poet, "my prayers used to be that my legions might triumph on the banks of the Araxes, or that the consul might display his eagles at Susa; _now all I ask is a supply of food to avert the extremities of hunger_. The province of Africa, which furnishes corn to my people, is under the power of Gildo. _He intercepts our supplies, and our food is at his mercy._ He sells the harvests which belong to the descendants of Romulus; he possesses the fields purchased by my blood. The warrior people which conquered the world, now dishonoured and in want, endures the miserable punishment of peace; _blockaded by no enemy, they are like the inhabitants of a besieged town_. Death impends at every moment; there remain only doubtful supplies for a few days. _My greatness has been my ruin_; I was safer when my territory was more limited; would that its boundaries were once more at my gates! But, if I am doomed to perish, at least let me have a different fate; let me be conquered by another Porsenna; let my city be burnt by a second Brennus. All things are more tolerable than hunger."[15] Nor was the state of Greece, in the later stages of the empire, more favourable.