History of the Peloponnesian War

On their giving way, the light-armed then at once took courage, and pressed on them with a far louder shout than ever. Those of the Lacedaemonians then who were overtaken in the retreat were slain; but the greater part escaped to the fort, and with the garrison that was there ranged themselves all along it, to defend themselves where it was assailable.

The Athenians, on coming up, could not surround and enclose them, owing to the natural strength of the place, but advanced in front, and endeavoured to force their position.

And thus for a long time, indeed for the greater part of the day, though suffering from the battle, dust, and sun, both sides held out; the one striving to drive them from the high ground, the other not to give way; and the Lacedaemonians now defended themselves more easily than before, as there was no surrounding them on the flanks.