An oversight of Hannibal occurred soon after. Desirous to refresh his horse in some good pasture-grounds, and to draw off his army, he ordered his guides to conduct him to the district of Casinum. They, mistaking his bad pronunciation, led him and his army to the town of Casilinum, on the frontier of Campania which the river Lothronus, called by the Romans Vulturnus, divides in two parts. The country around is enclosed by mountains, with a valley opening towards the sea, in which the river overflowing forms a quantity of marsh land with deep banks of sand, and discharges itself into the sea on a very unsafe and rough shore. While Hannibal was proceeding hither, Fabius, by his knowledge of the roads, succeeded in making his way around before him, and dispatched four thousand choice men to seize the exit from it and stop him up, and lodged the rest of his army upon the neighboring hills in the most advantageous places; at the same time detaching a party of his lightest armed men to fall upon Hannibal's rear; which they did with such success, that they cut off eight hundred of them, and put the whole army in disorder. Hannibal, finding the error and the danger he was fallen into, immediately crucified the guides; but considered the enemy to be so advantageously posted, that there was no hopes of breaking through them; while his soldiers began to be despondent and terrified, and to think themselves surrounded with embarrassments too difficult to be surmounted. Thus reduced, Hannibal had recourse to stratagem; he caused two thousand head of oxen which he had in his camp, to have torches or dry fagots well fastened to their horns, and lighting them in the beginning of the night, ordered the beasts to be driven on towards the heights commanding the passages out of the valley and the enemy's posts; when this was done, he made his army in the dark leisurely march after them. The oxen at first kept a slow, orderly pace, and with their lighted heads resembled an army marching by night, astonishing the shepherds and herds men of the hills about. But when the fire had burnt down the horns of the beasts to the quick, they no longer observed their sober pace, but, unruly and wild with their pain, ran dispersed about, tossing their heads and scattering the fire round about them upon each other and setting light as they passed to the trees. This was a surprising spectacle to the Romans on guard upon the heights. Seeing flames which appeared to come from men advancing with torches, they were possessed with the alarm that the enemy was approaching in various quarters, and that they were being surrounded; and, quitting their post, abandoned the pass, and precipitately retired to their camp on the hills. They were no sooner gone, but the light-armed of Hannibal's men, according to his order, immediately seized the heights, and soon after the whole army, with all the baggage, came up and safely marched through the passes.