‘But what about Calleva? We can’t leave it unguarded, sir. Not under the present circumstances.’

‘The men in the depot can handle the gate. Send for them. Now, we must move!’

Waving aside Cato’s protests the tribune kicked his heels in and urged his pony out of the gate and down the track, closely followed by Tincommius. Cato ordered the nearest sentry to run to the depot and have every able-bodied man sent to guard the town’s main gate, then he set off in pursuit of the tribune, running down the length of the column until he reached the wolf’s head standard at the front of his cohort. Beyond, far down the track, galloped Quintillus and Tincommius, riding straight for the distant smoke. Cato fell into step with his men, and glanced sideways at the new standard bearer. Although a youngster, like himself, Cato reflected ruefully, the man was huge - none of the wiry strength of Bedriacus, just a mass of muscle.

‘You’re Mandrax, aren’t you?’

‘Yes, sir.’

‘Well, Mandrax, keep the standard high and keep it safe, and you’ll do fine.’

‘Yes, sir.’

Cato looked round and saw, beyond the last century of the Wolves, the head of Macro’s cohort emerging from the gateway. The Boars were stepping out at a fast pace to join their comrades and only slowed down when they caught up with Cato’s men. Macro jogged forward to join Cato.

‘Where’s the tribune?’

‘Gone ahead with Tincommius to see what’s happening.’

‘Hope the twat’s careful,’ Macro grumbled. ‘Last thing we want is to give ourselves away.’

‘Or lose another of Verica’s heirs.’

‘Quite.’

‘Do you think this is wise, Macro?’

‘What?’

‘Taking both cohorts out of Calleva.’

‘We did it before. Anyway, those were Vespasian’s orders: to have a go at the enemy whenever possible and keep them away from our lines of communication.’

‘Bit late for that now.’ Cato nodded towards the columns of smoke.

‘Granted. But if we get the buggers who did that then there’ll be a few less of the enemy in the world. They won’t be tucking into our supplies any more. That’s a positive outcome in my book.’

Cato shrugged and decided to keep his concerns to himself.

The Wolves and the Boars continued down the track, heading towards the thinning smoke. They had covered just over three miles, according to Cato’s estimate, when the tribune and Tincommius returned. Macro halted the column and moments later the two riders reined in their mounts and slid to the ground, breathless and excited.