Macro blinked his eyes open. It was already daylight and the man was silhouetted against a pale blue sky. They had ridden hard for two days after leaving the fort and last night they had eaten and slept well. Macro had insisted on it, firmly believing the old military adage that men fight well on a full stomach. Around him there were the faint sounds of the first of his men waking. Macro threw back his cover and rose stiffly, stretching his shoulders until he felt the joints crack.

‘Ahhh! That’s better!’ He rolled his head and turned to the decurion. ‘Right then, show me.’

The two officers strode across the courtyard of the Nabataean way station and climbed the ladder to the lookout tower built over the gateway. As Macro stood beside the decurion, the latter scanned the dimly lit land to the south of the fort and then pointed.’Over there, sir.’

Macro squinted, and saw a faint flicker of movement, no more than a thin scattering of dots on the desert horizon; the head of the caravan he was waiting for, emerging from a depression in the plateau. ‘I see them.’

As the two officers watched, the first riders led out a long train of pack animals as the caravan crawled along the trade route towards the way station. When it drew closer Macro saw a small party of horsemen detach from the vanguard and start trotting towards them. He turned to the decurion.

‘Get our men on their feet. I want them ready the moment the caravan reaches us.’

‘Yes, sir.’The decurion saluted, climbed down into the courtyard and began shouting out his orders, rousing the last of the grumbling sleepers from their blankets. Macro stared down into the gloomy courtyard and nodded his approval as the decurion kicked some of the slower men into life. No laggard was going to show up the Roman army when those horsemen arrived. The auxiliaries hurriedly pulled on their boots and took up their weapons as the horsemen drew near. Due to the nature of the task ahead they had left their helmets, shields and spears at the fort, but they still wore chain mail over their padded linen tunics and had cavalry swords strapped to their sides. Finally, from each man’s shoulders hung a bow case, from which protruded the curved end of an unstrung compound bow and the feathered flights of the arrows. When Macro climbed down from the tower to inspect them he saw that they had all brushed off the fog of sleep and were alert and ready for action.