‘Raise shields!’ Cato ordered, and the men hefted them up to cover their bodies as a steady shower of missiles struck at the defenders on the rampart, or zipped past them, occasionally clattering off the shields of the survivors of the Sixth Century. Cato continued to scan the ramparts, noting the enemy must have quickly scaled the ditch and mounted the far slope, since he could see men clearly engaged with the enemy on the far side of the palisade. The defenders were holding their own for the moment. Not one enemy head could be seen struggling to climb over the palisade. But the fight was not entirely one-sided. Already at least a dozen Roman bodies were scattered across the slope leading down from the rampart. There were more along the palisade itself. Those who were wounded tried to struggle clear of the mêlée to avoid any further injury, as well as not hindering their comrades still locked in combat with the enemy.

In front of Cato the men he had assigned to bolster the gate had succeeded in overturning the cart and shoving it tight against the loose timbers. Now they were at work breaking up the hard ground a short distance back from the cart and shovelling the spoil against the cart. The gate shimmered under the impact of swords and axes thudding into the far side. Already, small splinters were flying through the air this side of the gate.

Cato was racked with frustration at having to remain behind the rampart, unable to see how the fight was progressing. It seemed to him that unless the enemy broke off soon they must surely overwhelm the men on the palisade.

The fight went on and on. Up in the flanking redoubts the legionaries had expended their remaining javelins. The men who had been issued with slings were whirling the leather thongs about their heads before releasing the deadly missiles into the dense ranks massed before the defences. The rest of the legionaries were hurling rocks and larger stones in a desperate bid to break the resolve of Caratacus and his men. Cato saw Macro bend, snatch up a rock from the dwindling stockpile and turn to hurl it with all his strength across the palisade. Macro watched the fall of the shot, and then thrust his fist into the air in a gesture of triumph. The next instant he threw himself flat as an arrow slashed through the space he had been standing in just before.

‘Cato!’ Tullius shouted from the palisade,just above the gate. ‘Battering ram coming up! Get your men up against the gate. Bolster it up!’

‘Yes, sir! Sixth Century, sheathe swords! Follow me!’