Cato slithered down the muddy slope. He glanced back at the palisade, but Macro had gone. Cato eased himself forward and crawled along the line of men lying in the ditch, smeared with mud. All around them the rain hissed into the grass and drops struck the water pooling in the ditch with tiny explosions. At length Cato drew up alongside Figulus and pointed towards the corner of the cohort’s fortifications. With the centurion in the lead the condemned men slithered along. When Cato reached the corner he slowly raised his head and looked around carefully, straining his eyes to pick up any signs of the sentries on the walls of the main camp. A few indistinct shapes moved slowly along the ramparts, but he felt sure that it was dark enough that they would not be detected if they moved slowly and carefully. The only danger was Proculus. The man might well panic and give his comrades away. Cato glanced over his shoulder at Figulus.

‘We’ll head out this way. The grass is long enough to give us some cover. Pass the word for everyone to follow me and stay low.’

‘Yes, sir.’

‘I want you to stick with Proculus.’ Cato lowered his voice so that there was no chance the other men would hear him.’If he panics, silence him.’

‘Silence him?’

‘Do whatever you have to. Understand?’

‘Yes, sir.’

Cato turned away, took a last look along the ramparts, then fixed his gaze on the large copse of oak trees he had noticed earlier in the day when foraging parties had set out to find firewood. Then he eased himself forward into the grass and slowly advanced on hands and knees, ears and eyes straining for any sign of danger. Behind him, the first of the legionaries emerged from the ditch and crept after him. One by one the condemned men followed on as stealthily as possible, hearts pounding. Figulus brought up the rear, thrusting Proculus ahead of him. The latter was terrified and stopped at the slightest threatening sound, dropping down to hug the earth in his trembling embrace before a swift prod from Figulus’ swordpoint started him forward again.

Cato had covered nearly two-thirds of the distance to the copse when he paused and raised his head to look back towards the camp of the Second Legion. Still no alarm. He was about to move forward again when he sensed a vibration beneath his splayed fingers.

‘Stop!’ he hissed. ‘Get down!’