‘That’s the place,’ Cato muttered as he gestured towards the warehouse. Macro and Septimus were on either side of him as they strolled along the wharf. The same guard who had brusquely rebuffed Cato a few days earlier was sitting on a stool beside the gate. He held a small loaf in one hand and a wizened end of cured sausage in the other and his jaw worked steadily as he stared absentmindedly at the barges moored along the quay opposite the line of warehouses. Despite the lack of grain there were still imports of olive oil, wine, fruit, as well as the usual flow of luxury foods for the richest tables in Rome. All of which fetched prices far beyond the reach of the teeming multitude of the capital’s poorest inhabitants.

A short distance along the wharf from the warehouse of Gaius Frontinus a small crowd of ragged people stood watching the unloading of a barge. Several jars of wine had already been landed and now a chain gang was unloading large baskets of dried dates. The gang master was accompanied by a handful of men armed with cudgels who formed a loose cordon around the goods on the wharf and warily kept an eye on the surrounding crowd.

‘Over there,’ Cato said softly. ‘We won’t stand out in the crowd.’

They made their way over to the fringe of the silent gathering of men and women, some with children, and edged round until they could see the warehouse gate and the guard sitting in front of it. A moment before, Cato had not considered what the man was doing, but now he saw it for what it was, a cold-hearted display of cruelty as he ate while others starved.

‘What are we going to do?’ asked Septimus. ‘We can’t just walk in.’

‘We could,’ Macro growled. ‘There’s three of us and one of him.’

Septimus shook his head. ‘If we force our way in, then word will get back to Cestius soon enough and the Liberators will know that we are on to them. We can’t afford to scare them into hiding. It’s just as important to smash the conspiracy as find the grain. Meanwhile we have to get in there and confirm that the grain is actually inside, and then get out without the alarm being raised.’

Cato scratched his cheek. ‘Won’t be easy. The warehouse is built round a courtyard. The wall facing the wharf is the lowest point. The rest of it is built up against the warehouses on either side and behind. There’s no other way in. We have to go in through the gate, or over the wall. If we try and scale that, we’re bound to be seen by the guard.’

Macro ran his eyes over the warehouse and nodded. ‘You’re right. So what do we do?’