History of the Peloponnesian War

At this time Demosthenes and Eurymedon arrived with the succours from Athens, consisting of above seventy-three ships (including the foreign ones) and about five thousand heavy-armed of their own and the allies, with dart-men, both Grecian and barbarian, not a few, slingers, bow-men, and the rest of the armament on a large scale.

No slight consternation was produced at the moment amongst the Syracusans and their allies, at the thought that they were to have no final deliverance from their dangers, seeing that there was newly come, none the less for the fortification of Decelea, an armament equal, or nearly so, to the first, and that the power of the Athenians appeared great on all sides; while in the former Athenian forces fresh confidence (considering their late misfortunes) had now sprung up. Demosthenes, on the other hand, seeing how matters stood, thought that it was not possible for him to waste the time, and 'so to experience the fate which Nicias had done.

For although that general spread terror on his first arrival, he was despised, through not immediately attacking Syracuse, but spending the winter at Catana, and Gylippus anticipated his success by arriving with forces from the Peloponnese, which the Syracusans would never have sent for at all if he had immediately attacked them; for while fancying themselves a match for him, they would at once have discovered their inferiority, and have been invested; so that, even if they had stat for them, they would not then have dune them the same service. Reviewing these things, then, and thinking that he himself too was decidedly most formidable to the adversary at the present time, even the very first day, Demosthenes wished, as quickly as possible, to avail himself to the utmost of the present dismay of their forces.

And seeing that the counter-wall of the Syracusans, by which they had prevented the Athenians from circumvallating them, was but a single one, and that if any one had carried the ascent to Epipolae, and then the camp on it, the work might easily be taken, (for no one at all would so much as wait his attack,) he was in a hurry to make the attempt.