right were thick groves of tamarisk, the occasional poplar and wild date palm. Turning left, they came to a gate set into a wall in such a way that it was necessary to turn to the left to enter, thus exposing one's right, unshielded side. The gate was a simple affair, and the wall a feeble enough thing, not more than twelve foot high but Ballista was not at all worried by the paucity of these defences. To approach them, the Persians would either have to come from the river – unlikely, given that the defenders would have requisitioned or sunk every boat on the middle Euphrates – or follow the route Ballista's party had just used – and that would be foolhardy as it would mean marching over poor going for several hundred yards, continually exposed to missiles from the town.
'Demetrius, please make a note: we will position heavy rocks on the lip of the southern ravine, to be released on any Persians foolish enough to approach from there.'
The gate sprang open, and a contubernium of legionaries saluted. Ballista and his men dismounted and chatted to them. Inside the wall at the foot of the cliffs more legionaries were tearing open the entrance to one of the boarded-up tunnels. Ballista looked up at the cliff face. It was closely stratified, line after close line of rock ruled across like a ledger. He suppressed a shudder at the thought of what lay behind, of the dripping dark tunnel he had edged down anxiously two days earlier.
They continued north along the water's edge. Everywhere was bustle and activity. Skins of water were raised from the river by means of ropes running over rickety-looking wooden frames and pulled by donkeys. Donkeys and men then carried the skins up the steep steps to the Porta Aquaria. Boats pulled in from the rich fields across the river, their decks full of figs, dates and trussed and indignant chickens. Farmers carrying or driving their wares added to the jostling on the steps to the town. The smell of grilling fish drifted from the market.
It was some time past midday, well past lunchtime. Ballista's party made its way over and one of the troopers ordered their meal.
Their horses fed, watered and tethered in the shade, the five men sat and drank wine and ate pistachios. The winter sun was as warm as a June day in Ballista's childhood home. Men busied themselves preparing the meal. The gutted fish were grilled in a metal cage hung over the fire from the branch of a tree. Juices spat and sizzled and smoke eddied.
At the foot of the steps, a goat escaped its owner and a furious burst of shouting in Aramaic ensued. Ballista couldn't understand a word. The irony struck him that he could speak the languages of these people's conquerors, the Romans, and of their would-be conquerors, the Persians, but not that of those whose freedom had been entrusted to him.
The sunlight glinted off the Euphrates as they rode on, full of goodwill. Ballista wondered how firm was the footing on the nearest island. If the Persians did not acquire boats, it might make a refuge, if the city fell, albeit a transient one. It was vital to have some form of exit strategy. He would do everything in his power to defend this town, but he had no intention of Arete being the scene of his last stand.
Having paused for a few words with the guards, the party rode out through the gate to the north, a twin to its southern counterpart. The slopes of the northern ravine were also steep but there were no paths on its bare flanks. The figures far away and high up on the battlements above the postern gate were tiny.
The rains had brought down a section of the cliff under the town walls and the fallen rock and earth stretched out into the ravine like a poorly made siege ramp. It looked unstable, its surface treacherous. Some attackers could climb it but, with use, it would most likely soon give way and resume its temporarily halted descent into the floor of the ravine. Still in high spirits, Ballista knew that had he been at the top he would have been sorely tempted to set Pale Horse at it, just to see if they could make it down in one piece.
'Onager,' said one of the troopers quietly.
The wild ass was grazing about a hundred paces further up the ravine. Its head was down, its white muzzle searching out camel thorn.
One of the troopers passed Ballista his spear. Ballista had never hunted onager. The cornel-wood shaft of the spear felt smooth and solid in his hand. A gentle pressure of his thighs, and Pale Horse walked slowly forward. The ass looked up. With a rear hoof, it scratched one of its long ears. It stared at the approaching horseman, then spun round and, gathering its quarters under it, sprang away. Ballista pushed his mount into a canter. While nowhere near full gallop, the onager was moving fast, supremely confident on the rough going of the partially dried-out bed of the torrent. Its yellow-brown back with its distinctive black-edged white stripe was pulling ahead. Ballista moved Pale Horse into a gentle gallop. Sure-footed as the gelding was, Ballista did not want to risk his mount flat out on shaky ground. There was plenty of time. This would be a long chase. There was nowhere for them to go except up the ravine.
The ravine closed in around them. Ballista could sense Maximus and the others falling behind. The onager came to a fork. With no hesitation, it bounded into the right-hand passage. Easing Pale Horse, Ballista looked around. The sides of the cliffs were sheer here. He must be about level with the western defences but he was out of sight of the walls of the town and the plain. A bend in the path hid him from those following. On his own initiative, Pale Horse followed the ass into the right-hand passage.
Down here, the heat of the summer still seemed to reflect out of the rocks. Clouds of gnats, washed by the rains out of the air up above, stung Ballista's face, got in his eyes, invaded his mouth. On and on, up and up the path climbed. The onager's hoofs raised puffs of mud as it bounded tirelessly on. Pale Horse was tiring. Ballista steadied his pace.
Suddenly, Pale Horse shied violently. Hooves fighting for purchase, he stopped dead and dived to the left. Given no warning, Ballista was thrown forward. All that stopped him disappearing over the gelding's right shoulder was his stomach punching into the front right-hand horn of the saddle. The horse, eyes wide with panic, was spinning in fast, tight circles. The motion was forcing Ballista ever further out, pushing him beyond the point of no return where he must fall. Instinctively, he still gripped the spear in his right hand, its point banging and clattering over the stones. Clinging with all the strength in his thighs, Ballista reached out and caught the nearest saddle horn with his left hand. With a convulsive effort born of desperation he began to haul himself back on. He felt the saddle slip, the girth coming loose.
Nothing else for it: Ballista threw the spear clear, let go his grip on the saddle and kicked hard with his legs. With a sickening wrench, his left boot caught on the horns. As the horse turned, Ballista was spun almost horizontally through the air. He tried to kick his leg free. His head was inches from the sharp stones. Fighting against the centrifugal force, he kicked again. His foot came out of the boot and he crashed, rolling to the unyielding ground.
His right arm was skinned, his shoulder jarred. He did not stop to check his injuries. He saw the spear and scrambled over to it, half on his knees. The weapon in both hands, he got into a crouch and turned warily around, looking for whatever had panicked the horse.
The great yellow eyes, blank yet cunning, looked at him from about twenty paces away. A lion. A male. Fully grown; it must have been eight foot long. Ballista could hear it breathing. He could smell its hot fur, thought he could smell its rank breath. The lion swished its tail, showed its teeth. It snarled: low, rumbling, terrifying – once, twice, three times.
Ballista had seen lions many times, safely confined in the arena. One had been despatched in the morning beast hunt in Arelate on the day he had first seen Maximus fight. Now would be a good time for the Hibernian to arrive and pay off his debt by saving my life, thought Ballista.
He had seen lions kill before – criminals, as well as a few beast-hunters in the arena. They used their momentum to knock the man down, pinned him with their weight and wide-spread, razor-sharp claws and sank their long, long teeth, almost delicately, into his windpipe.
Ballista knew he had just one chance. He assumed a side-on crouch and, gripping the shaft of the spear tightly in both hands, he wedged the butt under his still-booted right foot.
The lion moved, accelerating faster than Ballista thought possible. One bound, two, three, and it landed, front paws together, for the pounce. Head forward, it launched itself into the air at Ballista.
The spear took the lion in the chest. Its jaws opened. Its momentum forced the spear out of the northerner's hands, out from under his boot. Ballista threw himself backwards. A paw caught him a glancing blow, claws raking his upper arm, and sent him spinning back.
The lion landed, paws together, chest moving down, driving the spear deeper into its body. The shaft broke. The lion tipped over, slid on its back, legs splayed.
It got to its feet. Ballista pulled himself up, tugging his spatha free of its scabbard. The lion collapsed.
Maximus and the Christian-hating trooper clattered into view. 'You are the man!' The Hibernian was beaming.