Book 10
20.7
So on that very night he despatched some troops to the Spercheius, not to the places where the old bridges had stood, but lower down, where the Greeks would not notice the crossing, and just where the river spread over the plain and made a marsh and lake instead of a narrow, violent stream. Hither Brennus sent some ten thousand Gauls, picking out the swimmers and the tallest men; and the Celts as a race are far taller than any other people.
20.8
So these crossed in the night, swimming over the river where it expands into a lake; each man used his shield, his national buckler, as a raft, and the tallest of them were able to cross the water by wading. The Greeks on the Spercheius, as soon as they learned that a detachment of the barbarians had crossed by the marsh, forthwith retreated to the main army. Brennus ordered the dwellers round the Malian gulf to build bridges across the Spercheius, and they proceeded to accomplish their task with a will, for they were frightened of Brennus, and anxious for the barbarians to go away out of their country instead of staying to devastate it further.
20.9
Brennus brought his army across over the bridges and proceeded to Heracleia. The Gauls plundered the country, and massacred those whom they caught in the fields, but did not capture the city. For a year previous to this the Aetolians had forced Heracleia to join the Aetolian League; so now they defended a city which they considered to belong to them just as much as to the Heracleots.Brennus did not trouble himself much about Heracleia, but directed his efforts to driving away those opposed to him at the pass, in order to invade Greece south of Thermopylae.
