Cato assembled a work party and gave orders for the destruction of the barracks blocks closest to the gatehouse.That would provide a ready supply of materials for the second line of defence as well as clearing a space behind the breastwork to mass a force of defenders to meet any attack through the breach. The auxiliaries used iron hooks and lengths of rope to pull down the rafters and then the walls of each block. Other men took up picks and began to dig post holes for the roof beams. Timbers were nailed across the beams before the largest pieces of rubble were used to build up the foundations of the makeshift wall. The work continued through the morning and into the afternoon, under the glare of the sun, and all the time the onagers continued their assault on the gatehouse. Some rocks still overshot the wall and smashed into a building with a loud crash that made the defenders start and duck for cover, until the officers bawled at them to continue working. They were fortunate enough to escape any serious casualties until noon when one of the rocks pitched down into the middle of a work party, pulverising one man into a barely recognisable tangle of bloody limbs and wounding most of his comrades as splinters of stone exploded from where the rock hit the ground. Cato immediately shouted a string of orders to have the body taken away and the injured removed to the hospital, and sent the other men back to constructing the inner wall.

Then, in the late afternoon, as yet another shot smashed into the gatehouse, there was an ominous rumble of masonry as a crack opened up diagonally from the rampart almost down to the ground.The men paused for a moment to look and then returned to their labours with renewed determination. Cato quietly made his way over to Macro.

‘Won’t be long now, sir.’

‘Maybe,’ Macro responded.’But it’s still holding up for the moment. I just hope it lasts until nightfall. I doubt they’ll make any direct assaults until they can clearly see what they’re doing. Meanwhile, we’ll just have to make the best job we can of the inner wall.’