`How's the snooping trade?' I sneered, knowing he preferred to pretend nobody knew he was the Palace's Chief Spy. He ignored the jibe, leading Ma to a prime seat in the midst of Rutilius' snootiest supporters. There she sat bolt upright in her best black gown, like a grim priestess allowing herself to mingle with the populace yet trying not to let them contaminate her aura. Anacrites himself failed to find space on the marble perch, so curled up at Ma's feet, looking as if he was something unsavoury she had caught on her sandal and could not shake off.

`I see your mother's brought her pet snake!' My best friend Petronius Longus had failed to wangle himself a night's leave from his duties as enquiry chief of the Fourth Cohort of Vigiles, but that had not stopped him bunking off. He arrived in his working clothes – sturdy brown tunic, brutal boots and a night-stick – as if he was investigating a rumour of trouble. That lowered the tone nicely.

`Petro, we're planning to read love poems tonight, not plot a republican coup.'

`You and your consular pal are on a secret list as potential rioters.' He grinned. Knowing him, it might even be true. Anacrites had probably supplied the list.

If the Second Cohort, who ran this sector of town, discovered him moonlighting on their ground, they would thump him. It did not worry Petro. He was capable of thumping them back good and hard.

`You need an invigilator on the doors,' he commented. He stationed himself on the threshold, unwinding his stick in a meaningful manner, as a flock of strangers crowded in. I had already noticed them, due to their curious mixture of unattractive haircuts and misshapen footwear. There were some effete vocal accents, and a whiff of bad breath. I had invited none of these odd chancers, and they did not look as though they would appeal to Rutilius Gallicus. In fact, he came scuttling after them with an annoyed expression, helpless to intervene as they gatecrashed.