‘Halt the prisoners!’ a voice commanded from somewhere ahead, and the men behind Marcus shuffled to a stop. There was a pause before he heard boots crunching on the snow beside him, then his blindfold was removed. The morning mist had long since cleared and the sunlight was dazzling. Marcus squinted, his eyes watering. After a moment they adjusted to the light and he looked round in astonishment at the vast camp, hemmed in by the mountains that ringed the valley.

‘No wonder we could never find this place,’ Quintus said. ‘An army could search the Apennines for a hundred years and never guess it was here.’

Marcus looked back the way they had come and saw the path disappear into the cliff a few hundred yards away, as if into solid rock. He recalled the clammy cold of the last stage of the march, and the echo of footsteps and clink and clatter of equipment off solid rock. Quintus was right. The rebel camp was perfectly hidden. The only danger was that a traitor might betray its location. The fact that no one had, only proved that the slaves who flocked to Brixus’s banner shared his fervent belief in the cause for which he fought.

When the last of the blindfolds had been removed the prisoners were led through the heart of the camp towards the largest huts nestling in the centre. The route was lined with people cheering the rebel fighters. Their cheers turned to insults and cries of anger as they caught sight of the prisoners, and some scooped up filth from the ground to hurl at Quintus and the others. Because of his size and the simple cloak he wore, Marcus was spared the worst of the deluge. That was targeted at the tribune, his soldiers and Decimus, conspicuous in his expensively embroidered cloak. They soon emerged from the crowded path into an open space in front of a large hut. A cordon of men armed with spears held the crowd back and Marcus breathed a sigh of relief as the hail of missiles came to an end. He forced himself to compose his expression as he stood up straight and examined his surroundings. The hut was the largest building he had seen in the valley and he guessed it must be where the leader of the rebels lived. If this was the main camp, then there was a chance that Brixus himself was here. Marcus felt a surge of hope. Brixus would be sure to spare him, even though Marcus had marched with Caesar. He would have to explain that he was unwillingly involved in the proconsul’s campaign, and hoped that would be enough for Brixus to forgive him.

Turning towards the nearest of the guards, Marcus cleared his throat. ‘You there. Tell me, is that Brixus’s hut? I must speak to him.’