History of the Peloponnesian War

The Athenians in Egypt and their allies were still remaining there, and hostilities assumed many different phases with them.

For at first the Athenians were masters of Egypt; and the king sent Megabazus, a Persian, to Lacedaemon with a sum of money, that he might cause the recall of the Athenians from Egypt by the Peloponnesians being persuaded to invade Attica.

But when he did not succeed, and the money was being spent to no purpose, Megabazus with the remainder of it went back to Asia; and he sent Megabyzus, son of Zopyrus, a Persian, with a large force;

who, having arrived by land, defeated the Egyptians and their allies in a battle, and drove the Greeks out of Memphis, and at last shut them up in the island of Prosopis, and besieged them in it a year and six months, till by draining the canal and turning off the water by another course, he left their ships on dry ground, and joined most of the island to the mainland, and crossed over and took it on foot.