The optio paused: a person bearing a pass authorised by Plautius himself must hold some kind of rank. ‘Please wait here, sir.’

‘Commendable security you have here,’ Narcissus said, somewhat later, as he accepted a drink from Vespasian. ‘It was quite difficult persuading the senior watch officer to let us see you, even with the general’s pass. Your soldiers are sticklers for the rules.’

‘No rules — no order — no civilisation — no Rome.’ Vespasian trotted out the old adage and raised his glass to Narcissus. ‘But I’m glad you came, for whatever reason of your own. I needed to speak to you alone.’

‘Then our interests happily coincide.’

‘What about him?’ Vespasian nodded at the imperial secretary’s bodyguard looming in the shadows, still and silent.

‘Ignore him,’ said Narcissus. ‘I take it we’re safe in here?’

‘Absolutely. All entrances are well guarded.’

‘Oh yes?’ Narcissus took a small sip of wine as he fixed Vespasian with his eyes. ‘That’s not what my sources tell me.’

Vespasian coloured. ‘Your spy told you about that?’

‘I was informed that a sentry had been injured by an intruder. I take it nothing was stolen. Nothing important that is.’

‘Nothing.’ Vespasian said firmly, forcing himself to keep his eyes fixed on those of Narcissus.

‘So what happened?’

‘As far as I know, a slave girl was due to meet her lover in my command tent. He didn’t show and she waited a while and then left. Shortly afterwards the guards came across someone in the tent. He injured a sentry and fled the scene. A dropped torch set fire to the tent, but we managed to get it out without too much damage being done. And that is all there is to tell.’

Narcissus stared at him and slowly took another sip. ‘You tortured the girl?’

‘It wasn’t necessary.’

‘Really? There are some officers who get a kick out of that sort of thing.’

‘If you think—’ Vespasian half rose from his chair and the figure in the shadows moved quickly forwards. Narcissus waved the bodyguard back.

‘I think nothing of the sort. I just wondered if you had managed to get any more information out of her.’

‘Just what I said.’

‘And the man’s name? The one she said she had arranged to meet.’

‘Look here, Narcissus, I run my Legion, and if there are any problems to solve then I’ll sort them out. You’re a freedman, you don’t give orders to a legate. This isn’t Saturnalia, you know.’

Narcissus gave him a curious smile. ‘It’s funny you should say that. But no matter… I want the man’s name.’

Vespasian did not reply immediately. Much as he disliked Vitellius he was reluctant to give information that might lead an innocent man to his destruction. An innocent man now — but possibly a political rival later. Or an ally. Nothing was written in stone.

‘It would be best that you tell me now,’ Narcissus said quietly. ‘Before I get Polythemus to ask you.’