Late in the morning, the column passed through a long grove of tall date palms and Macro called a halt and ordered the men to down packs. Cato stepped to the side of the road and let the yoke drop into the grass. He leaned forward, hands resting on his knees, and panted for breath. Macro, sweating and breathing heavily but otherwise himself, shook his head pityingly. ‘You’re going soft. That’s what promotion does to a man.’

‘Bollocks.’ Cato reached for his canteen, pulled out the stopper and raised it to his lips.

‘Two mouthfuls.’ Macro pointed a finger at him as he strode past to have a word with his instructors. ‘Not a drop more.’

Cato nodded, and drank what he was allowed, letting the second mouthful swill round his parched mouth before he swallowed. He looked back along the column. Scores of men lay stretched on their backs, gasping. Amongst the officers he noticed a few absences, the faces of men he had hoped would fail to complete the march. The rest looked grim and determined.

As Macro returned to the front of the column, he stopped beside Cato and took a sip from his canteen. ‘Four officers and eighteen of the men have dropped out so far. Not at all bad considering the heat. But then these men are used to it. Eight miles done, I make it. Time for a short rest and then we’ll turn back towards the camp.’ Macro was silent for a moment before he raised a hand to shield his eyes and squinted briefly up at the sun before he took his second sip and capped his canteen. ‘That will be the real test of the men. The heat in the afternoon will be crushing. Can’t say I’m relishing the prospect. How are you holding up, sir?’

‘I’m managing.’ In truth Cato’s feet were throbbing with pain from the prolonged march on a hard surface and he felt slightly dizzy from his exertions and the heat. But he forced himself to stand upright and look Macro squarely in the eye.

‘And you?’

‘No problems,’ Macro replied as he took in his friend’s blanched face. ‘If I were you, I’d sit down and rest your legs while you have the chance.’

‘Not before you do.’

Macro shook his head. ‘Suit yourself.’