With one last darting look along the line, Callistus took a deep breath and gave the order to march. With fluttering heart, Rufus set Bersheba in motion.
All Rome seemed to be crammed into the overflowing streets around the forum. The crowds on the Via Sacra could be numbered in their tens of thousands and they perched on every possible vantage point on the temple steps and among the statues. Ahead of Rufus, columns of fluted marble marked the road at intervals, each with its solemn carved figure at its peak. From his elevated position on Bersheba's back, the great thoroughfare stretched out before him all the way to the massive bulk of the records office at the foot of the Capitoline. Close on either side were the great temples and public buildings which made this the most important of all Rome's streets. Already he was approaching the long frontage of the house of the Vestals. Beyond it was the regia and the temple of Divine Julius, with its rostrum where the great orators sometimes drew crowds of hundreds, even thousands.
As Bersheba advanced step by patient step, the crowds threw flower petals beneath her massive feet and the scent of them filled Rufus's nostrils. Cheers from a thousand throats rang in his ears. He did not dare look behind him, but he felt the comforting presence of Cupido close by, keeping pace with the imperial carriage where Caligula sat alone and unseen behind the silken curtains. This was Drusilla's day and the Emperor wanted nothing, not even himself, to distract attention from the great golden figure of his sister.
Now they were approaching the Rostrum Julium. Rufus could see the distinctive prow beaks from ships captured at the battle of Actium jutting from the wall on either side of the niche that held the shrine.
Bersheba was directly opposite the rostrum when they struck.
Rufus had been concentrating on the splendours surrounding him and, at first, didn't realize what was happening. Then, above the roars of the crowd, he heard Cupido's shout. 'Guards, to me.'
The sight that met his eyes when he twisted in alarm didn't seem possible. Twenty sinister figures had emerged from the still-cheering crowd and somehow breached the line of alert Praetorians. Each man wore a hooded cloak of brown wool that covered his face and each carried a drawn sword. The professional way they held the weapons marked them as soldiers, or ex-soldiers, and they moved silently towards the gilt carriage with an intensity of purpose that made their intention unmistakable. Assassins! They were trying to kill the Emperor. Rufus watched incredulously as a dozen more followed them, still unmolested.
'Guards, to me.' Cupido's shout was shriller, more desperate. Why were the Praetorians who lined the route not reacting? They stayed frozen in place, as immobile as the statues on their marble plinths.
Three or four of the faceless killers already surrounded each of Cupido's dozen men and still more were working their way between the individual conflicts towards the carriage. The fighting ebbed and flowed but Cupido somehow managed to stay between the assassins and the Emperor. Rufus saw the long sword flash and one man was down, blood fountaining from a gaping wound in his throat. But he was instantly replaced by another of the hooded figures and Rufus realized the attackers were trying to manoeuvre Cupido away from the carriage.
Without thinking, Rufus leapt from Bersheba's flank and sprinted towards his friend. 'Here, Cupido,' he shouted as he ran. Cupido stole a quick glance towards him and Rufus recognized the battle light in his eyes. Overwhelming odds or not, this was the young German's natural element, with a sword in his hand and an enemy at his front. The fallen assassin's weapon lay at his feet and with a flick of his wrist Cupido used his blade to send it, grip first, sailing into Rufus's hand.
'Remember what I taught you,' he shouted, his sword slicing up to parry a slashing blow with a clash that made Rufus's ears ring: 'the eyes, the throat and the balls.' The grim order must have sent fear through the hearts of his opponents, because their attack wavered. It was only for the merest instant but enough to give him his opening. He screamed his war cry and rammed his sword point into the mouth of the stocky figure in the centre, spraying gore as he back-cut it free, leaving the man to drop like a stone.
Rufus managed to work himself into position at Cupido's right side, blocking access to the carriage just as another group of the hooded killers broke through the Praetorian line. His friend's easy confidence helped still the icy panic churning in his stomach, but the truth was he was terrified. He swallowed hard and tried to concentrate as the assassin lying in a pool of blood at his feet twisted and uttered a choking scream before giving a convulsive shudder and going still.
Repeating Cupido's instructions over and over inside his head, Rufus kept his sword low and point up, darting with little jabs towards groin and stomach as the gladiator had shown him. It didn't seem very warlike, but it was enough to keep his nearest opponent at a safe distance. Rufus could see his assailant's eyes beneath the hooded cloak. He seemed very young and very frightened and he gave the jabbing blade more respect than it deserved. At first, Rufus wondered why, then he remembered the uniform he was wearing. The Praetorians were the Emperor's elite and among the best-trained soldiers in the Empire. His opponent must have believed he faced a battle-tested campaigner.
Cupido was fighting hard, but Rufus realized his friend was using his speed and agility to ensure that most of the assassins were forced to face him rather than the clumsy amateur at his side. Another of the killers fell before his sword, and the survivors stepped back, the courage that had brought them through the line quailing before the arena-honed skills of the man who confronted them.
'The carriage! Remember why we are here.' The shouted order had the ring of desperation. The voice came from beneath the hood of the tallest man, and stirred a memory in Rufus, but before his mind could search for it the assassins rushed the two defenders with swords flailing. Cupido speared one of the attackers in the chest, and somehow parried a sweeping sword cut with a dagger that appeared in his hand like a prop in a deadly conjuring trick. Rufus could hear the clash of iron behind them, and realized a similar battle was being fought on the other side of the Emperor's carriage, but it meant nothing to him. He had to concentrate on staying alive. Then there came a strange moment in the desperate battle when his immediate opponent moved away and he found himself in an oasis of calm at the centre of the maelstrom. Fighting for breath, he was able to look about him for the first time in many minutes.
Despite being outnumbered Cupido's wolves were holding their own. Bodies lay thick around the carriage, some still, some writhing in their death agonies, bleeding and groaning. The Emperor's coachman had been dragged from his seat and cut to pieces and one of the milkwhite mares harnessed to the carriage was down in her traces, her hooves thrashing as she fought to regain her feet despite the spear that pierced her belly.
Puzzlingly, the Praetorian line was still holding back the crowd, though several were looking round in alarm and were obviously wondering why they didn't receive the order to join the fight. Surely they could see their comrades were hard pressed and the Emperor was in mortal danger? It was unfair, Rufus felt, that he and Cupido appeared to be doing most of the work.
The glint of a blade broke the spell and he ducked low to allow the scything cut that would have taken his head from his shoulders to pass harmlessly above him. Then the battle closed in again and he was fighting for his life.
Now his hooded opponent was bigger and stronger and had none of the caution of the fearful young man he had faced earlier. He was forced back inch by inch until he stumbled over the legs of an injured man who had crawled between the wheels of the carriage for safety. The world turned upside down as he fell backwards and he had a momentary glimpse of a wide-eyed face behind the carriage window. He grunted as the attacker planted a hobnailed sandal on his chest and used him as a platform to get into position to hack at the gold-leaf pattern on the door of the coach. Rufus felt himself being crushed and instinctively lunged upwards with his sword. He experienced an instant of resistance, then an obscene bucking as the man above him squealed and twisted as he felt the needle point angle upwards into his body. Horrified, Rufus pulled the blade free and was rewarded with a howl of agony. At the same time a flood of warm liquid spattered across his face and chest, and the assassin toppled sideways.