‘So you should be. Such a role is usually only conferred after some years of service in the Guard. Even then, our men have to be aware of the precise manner in which they are to perform their duties. There is a very rigid hierarchy within the imperial palace and all guardsmen are expected to know it and address members of the household strictly in accordance with their station. As the officer responsible for recruiting, training and the manning of the Guard cohorts I will do my best to prepare you, although I’ve only been holding this office for a little over a month now. I’ll have someone who knows the ropes explain the details.’ He smiled again. ‘You will have to make allowances for me, as I will have to for you, eh?’

‘Yes, sir,’ Macro and Cato replied.

‘The palace cohort is commanded by Tribune Burrus.’ Sinius picked up a stylus and made a hurried note on a waxed tablet.

‘Tribune Burrus, sir?’ Macro raised an eyebrow.

‘That’s what I said,’ Sinius replied sharply, then suddenly his expression softened. ‘Ah, I understand. The tribunes of the legions are staff officers, aren’t they? It’s different in the Guard. The cohorts are each commanded by a tribune who usually holds the post for one year, before retirement. That’s not the only difference. The cohorts of the Guard are twice the size of those in the legions. In fact, there are nearly ten thousand Praetorians on the rolls. Some are on detached duties, but most are here in camp, giving the Emperor over nine thousand men to draw on if there is any emergency. Tends to make the mob think twice before they cause any trouble.’ He paused briefly. ‘Of course, we’re not the only ones charged with keeping order. There are the urban cohorts and the vigiles, who do a decent job of patrolling the main thoroughfares and breaking up drunken brawls and so on. The Praetorians are really there as a last resort. So when we go in, the people know we mean business.’

‘Does that happen often, sir?’ asked Macro.

‘No. But trouble is brewing,’ Sinius’s tone became serious. ‘Thanks to the disruption of the Egyptian grain supplies last year the stocks in the imperial granary are running very low. The dole has already been cut, and people are going hungry as the price of grain rises. We’ve already seen some small riots. It’s a funny thing,’ he mused. ‘Here we are in the greatest city in the world. We have fine bathhouses, theatres, arenas, goods and luxuries from every corner of the world, the best minds toil away in our libraries and one emperor after another has overseen the construction of vast temples and public buildings. Yet we are never more than a few meals away from unrest and the collapse of order.’

Cato and Macro made no comment and continued staring ahead.