The felucca rebounded from the impact and a fresh gust filled the sail, easing it round towards the shore as Cato centred the tiller. There was no chance to help the men of the other boat, nor spare them more than a moment's thought. No more than thirty feet from the riverbank the crewman released the mainsheet and the triangular sail billowed freely for a moment before it flapped in the light breeze. The momentum of the felucca carried it on and the craft had only lost a little speed when the boat lurched to an abrupt halt in the silt where a strip of reeds ran along the bank. Most of the legionaries had braced themselves but even so a number tumbled into their comrades and a chorus of grunts and curses broke out until Macro bellowed angrily at them.

'Shut your mouths! Shields up, swords out and follow me!'

He stepped up on to the foredeck, crouching slightly behind his shield, and took a running jump towards the riverbank. He landed with a splash and a brief rustle of trampled reeds. The water came up to his thighs and the silt on the river bed sucked at his boots. Gritting his teeth Macro pressed on, surging through the churned-up water, his shield brushing the reeds aside. He heard more men splashing down behind him, and a quick glance to either side revealed that the rest of the first wave of boats was edging into the reeds to disgorge their legionaries. The air was sweltering in amongst the reeds and Macro's ears filled with the rush of water and the grunts of his men as they struggled to gain firm ground. Over the rim of his shield he could see the nearest band of Arabs bearing down on them, giving vent to their battle cries as they raised their curved blades and charged down the short, grassy slope towards the Romans.

Macro emerged from the silt and checked his pace. More men rustled free of the reeds on either side, and then a moment later Cato was at his side, breathing heavily and eyes wide beneath the rim of his helmet as he braced his boots and raised the tip of his sword towards the oncoming enemy. The Romans were strung out in a ragged battle line along the riverbank and a moment later the dark-robed Arabs plunged in amongst the legionaries and the air was filled with the clatter and thud of shields striking and the sharp clash of metal as blade met blade.

Keeping his shield up, Macro took the first blows without striking back as he readied his sword, holding the handle tightly and drawing it back, ready to thrust. He heard the growl of an enemy on the other side of the shield and could smell the sour odour of camels that had impregnated the man's robes. He waited for the next blow, a cut down on to the metal trim of the shield, and then punched forwards, following up with a quick pace and another thrust which slammed into the body of the Arab. The man grunted as the breath was driven from his lungs. At once Macro swung his shield aside and stabbed with his sword. The Arab wore no armour and the point cut through the man's robes and lost none of its impetus before it struck his ribs. As Macro made to withdraw the blade, the Arab twisted to one side, snagging the sword and almost wresting it from Macro's hand.

'No you don't!' Macro snarled, wrenching the handle. 'Bloody rags these people dress in. Ain't bloody fair.'

With a ripping noise the blade came free and the Arab stumbled back, winded and bleeding. He glared at Macro, raised his shield and sword and fought to recover his breath. Then he attacked again. Macro deflected the blow with his shield, cut down on the man's wrist and then stabbed him in the throat. His foe collapsed on to his knees, dropping his sword as he clasped his neck, vainly trying to stem the blood pumping from the fatal wound. Macro stepped back a pace to quickly take stock of the situation.

To his right Cato was duelling a large Arab in a gleaming scale cuirass. A heavy curved blade, wider at the tip, slashed away at Cato's shield, driving him back until one of the legionaries struck at the Arab's leg, cutting through muscles and tendons. The man's leg gave way under him, he fell back, and Cato stepped up and struck a savage blow to the man's helmet, knocking him cold.

Along the bank of the Nile Macro could see that his men were steadily fighting their way up from the reeds. Above them, fifty paces to his left, Ajax sat on his horse, urging his men on as he punched his sword into the air. Macro turned towards a group of men who had landed from the same boat. 'On me! Form up on me!'

The legionaries hurried into a wedge behind their centurion, and Cato, seeing them, joined the small formation.

'Let's go!' Macro called out, pacing diagonally across the bank towards Ajax. Only a handful of the enemy stood before them, and some of these hurried away from the cluster of Romans to find easier opponents still floundering at the water's edge. Others, braver, threw themselves on Macro's small band and paid the price for their single-handed pursuit of glory. Then, as the wedge neared the top of the bank, the gladiator turned and saw the danger.

He bellowed an order to the nearest group of camel archers who stood waiting, weapons poised, as they could not shoot for fear of hitting their comrades. Ajax thrust his sword towards Macro and the others and shouted his command in Greek. 'Shoot 'em down! Kill them!'

His meaning was clear and needed no translation. The archers raised their bows, aimed down the bank, and loosed the arrows at close range. Cato winced as a barbed head burst through the inside of his shield, close to his face. To his right a man cried out as a shaft pierced his leg, chipping bone and cutting through muscle just below the knee. He staggered to a halt and crouched helplessly, unable to either continue the advance or shelter behind his shield and deal with the injury.

'Cut it out, man!' Cato yelled at him. 'Cut it out and move on, or stay here and die.'

The small formation closed up and continued forward into the storm of arrows, leaving their comrade behind. The shattering cracks and splitting of wood filled Cato's ears in a deafening cacophony as he paced forward at Macro's shoulder, hunched down behind his shield to protect his legs as best as he could. But being tall, his helmet and crest projected a little above the rim of the shield and an arrow tore through the crest, wrenching the helmet, and then another shot glanced off the top of it, knocking his head slightly to one side and making him briefly dizzy. Cato shook his head and staggered on, fearing that he might stumble and fall, and be at the mercy of the enemy archers. But the dizziness cleared and he clenched his jaw and followed Macro up and on to the bank.

The enemy loosed their last arrows before dropping their bows across their saddle horns and drawing their swords. They snatched up their reins and urged their camels towards the Romans. The beasts let out raw, throaty grunts as they charged with a loping gait.

'Hold!' Macro yelled, bracing his feet apart and pushing his shield out, ready to absorb the impact of the charge. Cato and the others followed suit and crouched, swords ready, sweating under the weight of their armour and the exertion of scrambling ashore and up the bank. The leading camel's neck stretched out above the rim of Macro's shield an instant before its heavy chest struck it a glancing blow. The rider reached out and forward, slashing down with his curved blade, which split the rim of the shield, leaving the tip a few inches from Macro's head. The Arab was at the limit of his reach and Macro rose up and hacked into the neck of the camel instead. The beast's jaw fell open and the tongue shot out as it gave a deep bleat of agony, then swerved aside, away from the small knot of Roman soldiers and straight across the path of the other riders. The camel staggered and collapsed on to its knees. Another animal stumbled into its flank, nearly unseating its rider. The rest stopped abruptly or tried to swerve aside. Their riders shouted angrily, struggling to regain control of their mounts, as dust swirled about the long spindly legs of the camels.