Cato looked round the wharf for a moment before fixing his attention on the men unloading the barge, surrounded by the small crowd. ‘We need a diversion. That’s a job for you, Septimus. While Macro and I get inside the warehouse.’

He quickly explained his plan and then, while Septimus worked his way through the crowd towards the edge of the wharf, Cato and Macro moved off, back in the direction of the Boarium. They took care to keep close to the edge of the Tiber in order not to attract the guard’s attention. There was a small danger that he might remember Cato’s face, even though his coarse features and bovine expression hinted at a mind that was not readily accustomed to the retention of information. Once they had covered a safe distance they stopped and looked out across the moored barges to the leaden flow of the Tiber. Cato glanced towards the crowd and saw Septimus standing close to the gangway leading up from the barge. Cato discreetly raised a hand to give the signal.

Septimus edged forward and waited until one of the slaves carrying the baskets of dried fruit struggled up on to the wharf. Then he darted between two of the gang master’s men and thrust his arms out into the slave’s side. The latter tumbled over, his basket flying through the air until it hit the ground and dates exploded across the wharf. At once the waiting crowd surged forward and down, hands scrabbling to scoop up the dried fruit.

‘Get off! Get back, you bastards!’ the gang master bellowed in rage as he laid into them with his cudgel. He looked up at his men. ‘What are you lot waiting for? Get ‘em away from the goods!’

His men were startled into action and they began to lash out at those scrabbling around on the ground at their feet. In the struggle another basket was knocked over, spilling its contents. An excited cry went up as the starving mob closed in.

Cato glanced quickly over his shoulder and saw that the guard outside the warehouse gate had stopped chewing and stood up to get a better view of the action. His lips lifted into a slight smile of amusement, and then he took a few paces away from his station to watch the frenzied violence as the mob and the gang master’s men fought it out over the spilled barley.