`On his way?'

`To the Prefect. He's a stupid sod of a jeweller who constantly leaves unattended lamps swinging in the breeze in his colonnade.' `So what'll he get?'

`A hefty fine. I'm taking him over to headquarters to be processed. Maybe you'd better come with me. Rubella wants a welcoming word.' Rubella was the Fourth's tribune.

I grinned. `Am I going to enjoy this?'

`What do you think?' twinkled Fusculus. As he collected his cudgel, the arsonist and some official notes about the prisoner's misdemeanours, he continued filling me in. Obviously he was a thoughtful type, and one who enjoyed lecturing. `Apart from all that, it's work as normal – which means not doing it because of more urgent priorities. We have an ongoing investigation of a secret religion that will have to be delayed again because of the new task, as will our long-term granary fire-protection. programme, our anti-toga-theft campaign at the baths, and keeping up the lists of undesirables.'

`What undesirables are these?' I asked, curious about what kind of degenerate earned a formal state record.

Fusculus looked rather shy. `Oh well, you know we have to assist the aediles with their registers. Bars and brothels.'

`Somehow, Fusculus, I don't think bars and brothels were what you meant!'

`Mathematicians and astrologers,' he confessed. I looked faintly surprised. `Anyone who leans towards the occult or magic has a question mark over them in the public-order stakes. Philosophers especially.'

`Oh, flagrantly seditious!'

`So I'm told. I'm not saying we believe the principle, Falco, but we like to be ready in case the Emperor demands a purge. Under Nero it was Christians. That's eased off lately, so we can go back to actors.'

`Disgusting degenerates!' I did not reveal that I had just spent three months working with a theatrical troupe. `Who else?'

`Greek shopkeepers.'

`Now that's a new one. What's wrong with them?'

`They keep their booths open night and day. It's reckoned unfair on the locals. That can lead to trouble, so we keep lists to tell us quickly who to lock up when a row flares and dung starts being hurled about.'

Somehow I didn't suppose he kept matching details of the local businessmen who complained.

`I'm sure it's a relief to all honest citizens to know you stay vigilant!' Sarcasm was breaking through as I sensed there was more. `And is there anybody else who threatens public order so badly you keep them under surveillance and maintain their names on secret lists?'

`Informers,' Fusculus admitted, looking resigned.

XVI

RUBELLA WAS STILL eating sunflower seeds.

He looked about fifty. Must have been, to have put in a full stint in the legions. He had been a chief centurion; that takes sticking power as well as a clean nose. Once he would have been about my level socially. Twenty years had pushed him on: promotion the whole way in the legions, discharge with honour, and buying himself into the middle rank. Now he commanded a thousand men; poor quality, it's true – the vigiles were ex-slaves for the most part – but if he continued to dodge disasters he could aspire to the Urban Cohorts, and maybe even the Praetorian Guard. Rubella was made – though he had spent his whole useful life getting there.

He was big physically; quiet; not tired by life. His grey hair was still close-cropped in the military manner, giving him a tough appearance. His strength was enough to move an ox aside merely by leaning on it. The knowledge soothed him. Rubella took the world at his own pace. He was utterly composed.

Fusculus introduced me. Rubella forced himself to pause between the seeds. `Thanks for coming over. I like to induct new attachments personally. Welcome to the squad, Falco.'

The tribune's welcome was deceptive. Like Petro, he didn't want me near the squad. He seemed friendly, but it was a barely concealed front. I was an outsider. Uninvited. Liable to uncover private grief.

Some officials would have made me talk about my work for the Emperor. Rubella must have been told of my past career. He might have picked it over, full of prejudice and seeking to belittle me. Instead he ignored that side completely: a worse insult.

`You're an old colleague of Petronius'.'

'We go back ten years.'

`Same legion?'

`Second Augusta. Britain.'

`A good man,' said Rubella. `Absolutely straight…' His mind seemed somewhere else. `I've been having a talk with Petro about this task with the gangsters. He suggested I assign you to looking up some past history.'

I noticed the subtle way Rubella had put himself in charge of allocating duties. Clearly it wouldn't just be Petro and me haggling over the booty. Rubella wanted in. Any moment I expected the Prefect of the Vigiles to put an oar in the stream too. Then there was probably the Fourth Cohort's interrogation officer – Petro's immediate superior – to contend with. And no doubt each of the seven cohort centurions thought himself top man on the Aventine. If I wanted work, I would have to grapple for it.

`Past history?' I asked, giving nothing away. If a client paid I would look up birth certificates or wills, but it was not my favourite activity.

`You have skills we should be using.' I noticed his dismissive tone. I had plenty of skills available. Informing needs rugged persistence, intelligence, intuition and hard feet. `Attention to detail,' Rubella selected.

`Oh dear. I feel like a rather plain barmaid when offered as a chat-up line, "I like you, you're different from the other girls…" '

Rubella stared at me. Apparently he had as much sense of humour as a centipede. He couldn't take an interruption either. `Petro doesn't agree, but I think we should send you to meet Nonnius.'

`The nark who used to work with Balbinus? The rent-collector whose testimony put the big rissole away?'

`We have an excuse to intervene. The man is involved with tracing Balbinus' assets’

'Oh I'm thrilled!' I was annoyed. I let it show. `So while there's juicy work on the streets, I'm to be sitting with an abacus playing at audits!'

'No. There already is an auditor.' He had failed to notice I was ready to explode. `A priest from the Temple of Saturn is representing the state's interest.'

He could represent the Establishment on this enquiry too, if blinking at profit-and-loss columns was supposed to be my fate. `I can contribute something more useful than spotting a few dodgy figures on a balance sheet!'

`I hope so! You were assigned to us with a reputation, Falco. You'll want to sustain the myth.' Rubella was smiling now. He could. All he had to do was munch endless seeds in his official throne of office while minions scurried in the dust. He knew he had riled me; he was openly enjoying it. `Do I detect a problem with rank? I bet when you were in the army you hated your centurion!'

`I don't expect he liked me much either.' Aware of the goad, I came under control at once. Maybe he was trying to pack me back to the Palace with a complaint that I was uncooperative. If he imagined he could shed me before we had started, tough. I wasn't intending to play.

Rubella walked away from the fight. Barely pausing, he reiterated, `Past history, yes. If we believe that the gangsters who robbed the Emporium have dropped into a hole that formed after Balbinus was removed, maybe we should have a look at what existed before the hole.'

The man made sense. My mind leapt, and I threw in quickly: `Whoever ploughed the Emporium was lined up and waiting to go. Balbinus had only taken ship the night before. Someone could hardly wait to announce there was a new criminal regime.'

`They were effective,' Rubella commented. His manner was restrained. He looked like a cook who hopes the pudding will get stirred if he just stands gazing at the bowl.