The Syracusans' work was destroyed by a prompt and well-executed attack; and a second counter-work carried across marshy ground some distance to the south of Epipolae and near to the Great Harbour was also demolished after a sharp action, in which Lamachus fell, an irretrievable loss.
But even in this crowning triumph the cramping egotism of his nature - a mental vice which now grew on him rapidly - fatally narrowed his outlook and led him to commit an irretrievable blunder.
At the height of its glory sudden and irretrievable ruin fell upon the Order.
But he was soon to suffer irretrievable defeat.
In battle the carroccio was surrounded by the bravest warriors in the army and it served both as a rallying-point and as the palladium of the city's honour; its capture by the enemy was regarded as an irretrievable defeat and humiliation.