Macro stood only a spear’s length away, crouching low, sword point raised. The others were slightly further off, and spread out, so that Bannus had to keep twisting his neck to keep them all in sight.

‘Don’t move!’

Yusef raised his bound hands and started to claw at the hairy forearm across his throat.

‘He can’t breathe,’ Cato said calmly. ‘Bannus, you’re killing him.’

Bannus stared back suspiciously for an instant, and then relented, loosening his grip just enough to let Yusef gasp some air into his lungs.

‘That’s better,’ said Cato. ‘Now, we have to talk . . . again.’

‘We said all we had to say last time.’

‘There’s no escape now, Bannus.You must surrender. But you can do one good thing before it’s over. Spare the boy and return him to Miriam.’

‘No!’

‘What choice have you got?’ Cato pleaded. ‘We cannot let you escape again. Let him go.’

‘No. Symeon! Saddle my horse. You, Roman - the short one. Your mounts have to be nearby. Bring them here!’

‘Fetch them yourself, fuckwit,’ Macro growled.

Bannus raised his blade to Yusef ’s face and, with a deft flick, nicked his cheek.The boy yelped with pain as a thin trickle of blood coursed down his cheek and across Bannus’ forearm.

‘Next time, I’ll take one of his eyes out. Now get the horses, Roman.’

Symeon looked on in horror before he turned to Macro. ‘For pity’s sake do as he says.’

‘I am not going to let him escape,’ Macro said firmly. ‘Whatever he threatens to do to the boy. It ends here.’

‘Macro, I beg you.’ Symeon’s voice was broken with anxiety. ‘Not the boy. He’s all that Miriam has.’

Macro did not reply, and did not take his eyes off Bannus as he stood poised to strike. So it was Cato who first noticed the figures emerging from the darkness of the desert. A dozen camel riders in dark robes, quickly fanning out so that the five figures by the fire were surrounded.

‘Macro,’ Cato said softly. ‘Sheathe your sword, slowly.’

Symeon and Cato did the same and turned towards the new arrivals. There was a moment of stillness in which Cato felt himself and his companions scrutinised by the silent riders. Bannus lowered his knife, but kept his arm firmly round Yusef.

Cato whispered, ‘Symeon, who are they?’