‘I was just thinking about all the threats that Rome has faced over the years, and now it seems that hunger will succeed where barbarians, slave armies, ambitious politicians and tyrants have failed. If there’s one great enemy of civilisation it is surely starvation. No empire, no matter how great, is ever more than a few meals away from collapse.’ He glanced round at the others. ‘Interesting, don’t you think?’

Septimus glared at Cato and then caught Macro’s eye. ‘Your friend is not very helpful at times. Tell me, does his mind often wander like this?’

Macro nodded wearily. ‘You can’t imagine. Does my head in.’

Cato could not help smiling apologetically. ‘Just an observation.’

‘Well, keep your eyes and mind on the job,’ Septimus chided. ‘The Liberators are planning to do something soon. We have to be on our guard and look to the safety of the Emperor and his family. The enemy might have another chance to do something two days from now.’

‘Why?’ asked Cato. ‘What’s up?’

‘The last section of the drain for the lake will be completed tomorrow. Claudius has decided to hold a celebratory feast for the engineers and a select audience before he gives the order for the sluices to open. It’s not a public event, so there won’t be too many people for your century to keep an eye on. But there’s always the chance of trouble as the imperial retinue makes its way out of Rome, or comes back the same way.’

‘We’ll keep a close watch on the old boy,’ said Macro. ‘After that business in the Forum you can count on it.’

‘I hope so,’ Septimus replied as they reached the entrance to the Boarium. ‘It’s clear enough why the Liberators want the grain. That’s the carrot they can offer to the mob once they’ve removed the Emperor. The question is, what are they going to use as the stick to beat Claudius? There’s not much time left before they make their move, and we’re still no wiser about their plan. You must concentrate on Sinius, find out who his contacts are. If we have the names of the ringleaders then we can strike first.’

‘We’ll do our best,’ Cato reassured him. ‘But Sinius isn’t giving anything away. He’s using us, but he’s not taking us into his confidence. If we discover anything, we’ll make sure we leave a note at the safe house at the first opportunity.’

‘Very well.’ Septimus bowed his head in farewell. ‘I’d better make my report to Narcissus. He’s not going to be happy.’