Confirmed in his authority by his triumphant refutation of the slanders of his enemies, Pericles adopted the wisest measures for the public defense against the invasion which was threatened by the Peloponnesians. Unwilling to risk a battle with the Spartans, who were esteemed not less invincible by land than the Athenians were by sea, he caused the inhabitants of Attica to transport their cattle to Eubœa and the neighboring islands, and to retire with as much of their other property as they could take with them, within the walls of Athens. By this provident care, the city was stored with provision sufficient for the support of the multitudes which now crowded it; but greater difficulty was found in furnishing proper accommodation for so vast a population. Many found lodgings in the temples and other public edifices, or in the turrets on the city walls, while great numbers were obliged to construct for themselves temporary abodes in the vacant space within the long walls extending between the city and the port of Piræus. The memorable contest of twenty-seven years’ duration, called ‘the Peloponnesian War,’ now commenced (431 B. C.). The Spartan king, Archidamus, entered Attica at the head of a large army of the confederates, and meeting with no opposition, proceeded along its eastern coast, burning the towns, and laying waste the country in his course. When the Athenians saw the enemy ravaging the country almost up to their gates, it required all the authority of Pericles to keep them within their fortifications. While the confederates were wasting Attica with fire and sword, the Athenian and Corcyrean fleets were, by the direction of Pericles, avenging the injury by ravaging the almost defenseless coasts of the Peloponnesus. This, together with a scarcity of provisions, soon induced Archidamus to lead his army homewards. He retired by the western coast, continuing the work of devastation as he went along. Early in the summer of the following year, the confederates returned to Attica, which they were again permitted to ravage at their pleasure, as Pericles still adhered to his cautious policy of confining his efforts to the defense of the capital. But an enemy far more terrible than the Peloponnesians attacked the unfortunate Athenians. A pestilence, supposed to have originated in Ethiopia, and which had gradually spread over Egypt and the western parts of Asia, broke out in the town of Piræus, the inhabitants of which at first supposed their wells to have been poisoned. The disease rapidly advanced into Athens, where it carried off a great number of persons. It is described as having been a species of infectious fever, accompanied with many painful symptoms, and followed, in those who survived the first stages of the disease, by ulcerations of the bowels and limbs.