Before Cato could respond, there was a flat blast of a horn away to the south. The sound was picked up by other horns and soon the first of the enemy’s drums added to the din. A thin blue light filtered through the air and the faintest of mists hung across the Nile like a silk veil.

Macro regarded the stirring Nubian host for a moment and then muttered, ‘Now we shall see if Prince Talmis will give battle on our terms.’ He shot a quick glance at Cato. ‘Let’s hope that Livius was never on his reading list, eh?’

Cato did not reply but stood erect, staring out over his men towards the enemy camp. It did not take long to discern the dense blocks of men and horses massing opposite the Roman line. As the sound of their horns, cymbals and drums rose even higher, the Nubian army began to emerge from their camp, blotting out the sight of the campfires they were leaving in their wake.

‘It seems they are going to take the bait,’ said Cato with a relieved nod. ‘The first round to us then. I’d better return to my command post.’ He turned and smiled at Macro. ‘Don’t worry, I won’t remind you of the plan again.’

‘As if I could forget.’ Macro tapped his helmet. ‘The skull might be as thick as oak but the brain still works.’

They clasped each other’s forearms and then Cato strode swiftly back towards his horse and climbed into the saddle. He waved a hand at Macro and urged his mount into a trot as he headed back towards the small cluster of officers sitting in their saddles to one side of the reserve cohort. Macro watched him a moment, then went through the familiar routine of checking each strap and buckle of his armour and weapons. Satisfied that all was well, he handed his vine cane to one of the medical orderlies who was passing by with a bag stuffed with linen strips to dress wounds.

‘Look after that for me,’ he growled. ‘I’ll want it back after the battle. Any harm comes to it and I’ll use what’s left of it to break your back.’