History of the Peloponnesian War

For the length of the Phalerian wall to that part of the circumference of the wall of the city where it joined was thirtyfive furlongs, and that part of the circumference which was guarded (for some of it was not kept with a watch, namely, the part between the long wall and the Phalerian) was forty-three furlongs. And the length of the long walls down to Piraeus (of which there was a watch only on the outmost) was forty furlongs. And the whole compass of Piraeus together with Munychia was sixty furlongs, whereof that part that was watched was but half.

He said farther, they had of horsemen, accounting archers on horseback, twelve hundred; and sixteen hundred archers;

and of galleys fit for the sea, three hundred. All this and no less had the Athenians when the invasion of the Peloponnesians was first in hand and when the war began. These and other words spake Pericles, as he used to do, for demonstration that they were likely to outlast this war.