Nevertheless, I warned Agrippina that Messalina’s influence over Claudius did not appear to be waning. She was ruthless and sly in exploiting her husband’s fears and growing superstition. One day as Claudius entered her court, a litigant came running up and begged for an audience.

‘Your Excellency,’ he fawned. ‘Take care this day, for I dreamt you were assassinated.’

Claudius, of course, was full of concern and begged the man to describe the would-be assassin: the cunning litigant turned and pointed to his rival waiting in the court. Claudius was taken in by this nonsense and the poor victim was immediately hustled away and executed on a fictitious charge of treason. Messalina was equally successful in using the same method to despatch a senator she hated. One morning Narcissus, the powerful freedman, burst into the Emperor’s bedchamber. Sweaty and stricken, he threw himself on his knees and told the Emperor of his dream in which Messalina’s hated senator had forced his way into the palace and stabbed Claudius to death.

‘I have dreamt a similar dream,’ Messalina divulged.

Claudius heard them out, not yet fully believing, until a chamberlain promptly arrived to say that the very same senator — whom of course Messalina had secretly invited to the palace — had tried to force his way into the imperial chambers. It was confirmation enough for Claudius: orders were issued and, by noon, the senator concerned was forced to take his own life.

Agrippina listened to this story and asked me to repeat it several times.

‘A clever ruse,’ she murmured. ‘A very clever ruse. If only poor Passienus was better, I’d travel to Rome myself to see what was happening.’

Poor Passienus was by now in a terrible way. His mind was wandering and, for some strange reason, he had fallen in love with a beech tree in his garden at Tusculum. He would embrace the trunk and kiss it, ordering his slaves to water the tree only with the finest wine from his cellars. He would sit and talk to it and sleep in its shade, and, late one afternoon, he died there. Agrippina mourned dutifully, and then had the body cremated and buried in the family tomb on the Appian Way. Once the funeral was over, Agrippina announced it was time for her to return to Rome.

Agrippina used Passienus’s wealth to set up in luxury in her house on the Via Sacra. Once again she was visited by the powerful and the mighty Claudius himself came, to eat and drink, and listen owl-eyed to Agrippina’s lectures on Roman history. He would fall asleep, mouth open, and a slave would come and tickle his throat to get rid of the excess food and wine. Once this was achieved, two Nubian slaves lifted him up and carried him back to his litter.

Oh, Agrippina was still plotting. I sometimes ask myself why I stayed with her but. . I loved the woman! In spite of all her wrongdoing and, yes, her killings, I admired her courage, and the fact that, once she had given her heart, she loved without compromise or constraint. She reminded me of a beautiful eagle, wings back, plunging down to the earth; once she had chosen her quarry, only death itself could stop her. During those early months after her return to Rome, Agrippina, like an eagle, perched on a branch, high above the scheming politics of the court, watching, waiting for her opportunity.

Claudius was undoubtedly tiring of Messalina’s strident ways, her jealousy, her fury when her will was blocked. So Agrippina prepared to make her first move. The secular games were being held in Rome, and Nero was invited to take part whilst Agrippina joined Claudius in the imperial box. Messalina and her coterie were also there, and Agrippina watched them avidly, fascinated by Messalina’s open flaunting of her favourites. One of these, Vitellius, Governor of Palestine, was even allowed to carry one of Messalina’s slippers next to his heart as a token of his undying love for her. We all settled down, and watched Nero, aged eleven, and Britannicus, aged nine, lead the procession into the arena. Both boys, their hair dressed in decorative garlands, carried long, sharp javelins, a bow and quiver over their backs and around their necks chains of gold. When Nero came forward and saluted the Emperor, he was greeted by thunderous, rapturous applause, a sharp contrast to the courteous cheers and polite hand claps that greeted Britannicus: Domina had hired a special claque and they did a brilliant job. Messalina turned in her chair and glared at Agrippina, who smiled icily back, her message clear: Agrippina, daughter of Germanicus, had returned to Rome and her war with Messalina had only just begun. Afterwards I advised caution, but as usual Agrippina just ignored me.

‘What can the bitch do?’ she taunted. ‘Attack me? Attack the grandson of Germanicus? Rome would not tolerate it. It’s time we went to work, Parmenon.’

The invitations to Claudius and his freedmen Narcissus and Pallas increased, but at these evenings Agrippina began to look anxious and troubled, refusing to tell Claudius the reason. At last she produced Styges, an Egyptian soothsayer, a mountebank who could convince even prudent men that he had the gift of seeing the future. At first Agrippina pretended to be reluctant to let her self-styled seer inform the Emperor of what he had divined. Only when Claudius cleared the chamber and took the most solemn oaths, did Styges reveal that he had dreamed the husband of Messalina was in great danger.

‘Not Messalina herself?’ Claudius asked.

‘No, Excellency, her husband.’

‘But, but. .’ Claudius stammered. ‘What can be done? What shall I do?’

Agrippina reminded Claudius of the oath he had taken not to tell anyone of the seer’s prophecy. The Emperor, now hooked like the fish he was, asked Agrippina for advice.

‘At the moment the danger is some time off,’ Domina replied. ‘But, Excellency, you must plan how to deal with it. If Messalina. .’ She let her words hang in the air.

‘If Messalina what?’ Claudius demanded.

‘If Messalina could be encouraged to take another husband, just for a while. .’

Claudius blinked and glanced at me. ‘Wh- wha- what do you think, Parmenon?’

I stared at my mistress, who was acting to the full her role as concerned Roman matron. She held my gaze, and I glimpsed the laughter in her eyes.

‘The most important thing, your Excellency,’ I insisted, ‘is the health and safety of your sacred person. That’s why you must keep this warning to yourself. If it became public knowledge. .’

Claudius bit his lip.

‘Think of it this way, your Excellency,’ I continued, ‘danger threatens on all sides, but that is part of your sacred duty. Didn’t the divine Caesar, the noble Augustus, and all the great heroes of Rome have to face danger?’

Claudius nodded. Oh, in many ways he was such a great fool!

‘What Domina Agrippina wishes to ensure,’ I explained smoothly, ‘is that there is protection between you and that danger.’

Claudius poked me sharply in the chest. ‘You could become Messalina’s husband for a while, but no bed sport, mind you.’ He threw his head back and bellowed with laughter at the look of consternation on my face.

‘I was only joking,’ he wheezed. ‘Messalina would never have anything to do with someone who was not only of inferior rank but ugly with it!’

I smiled in acknowledgement of his wit.

Once the Emperor had gone, Agrippina made me share her couch. She embraced and kissed me on the lips and licked my ear.

‘Clever boy, Parmenon,’ she whispered. ‘We have the rod, we have the line, the fish is near. All we need to do is choose the bait.’

Agrippina now dug deep into her treasury and started to throw the most lavish of parties. Invitations were extended to every member of the high society of Rome although Claudius and Messalina were quietly ignored. Agrippina’s chefs became the toast of the city, serving dishes such as ostrich brains and peas mixed with gold, or lentils on a bed of precious stones, so the guests were both well-fed and well-rewarded. Plump chickens, sows’ udders, sucking pig, hot boiled goose, stuffed hare, venison, bream and the tastiest oysters fresh from the dredge were all on offer. Troupes of poets, musicians, dancers and entertainers were hired. Agrippina was the most charming of hostesses, flirting and dallying with all the most eligible bachelors until she found her prey: Gaius Silius, probably the handsomest man I have ever met. He had the looks, body and deportment of a Greek god, with a brain as thick and as dead as a statue. Agrippina acted the role of the infatuated maiden, lavishing attention and gifts on him, and pretending to be distraught when he was absent. Their affair became the talk of Rome and attracted the attention of Messalina, who had her own plans for young Silius. A romantic tug of war took place which was won by Messalina. She and the young bachelor became utterly infatuated with each other, united not only in lust but a desire to mock and shame Agrippina in the eyes of others.