History of the Peloponnesian War

Thus then the Athenians were enclosed with walls, and began to furnish themselves with other buildings immediately after the retreat of the Medes.

Now Pausanias, the son of Cleombrotus, was sent out from Lacedaemon as general of the Greeks with twenty ships from the Peloponnese; there sailed with him also the Athenians with thirty ships, and a large number of the other allies.