History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
Meanwhile in Sicily the Syracusans and their allies, having reinforced the ships which were keeping guard at Messene by bringing up the other naval force which they had been equipping,[*](cf. 4.1.4.) were carrying on the war from Messene.
To this they were instigated chiefly by the Locrians on account of their hatred of the Rhegians, whose territory they had themselves invaded in full force.