I remembered the words that Fulvia had quoted to me, and spoke them back to Calpurnia: " 'He's dead now. He died fighting. It was a brave death.' "

Calpurnia nodded. "Exactly. Those were the very words Caesar told her to say. Fulvia stopped, of course. She took Cassandra home with her. And when Cassandra revealed the specific details of Curio's end, which were later confirmed, it seemed like a true vision from the gods. Thus Cassandra won Fulvia's unquestioning trust, along with that of her mother, Sempronia."

"And meanwhile Caesar kept the news of Curio's death to himself?"

"He swore the messenger to secrecy and told no one, not even Marc Antony-not even me-for two days. Information is gold. By spending that particular nugget of information with the utmost discipline, Caesar bought Fulvia's faith in Cassandra."

"But Curio died fighting for Caesar. Why send a spy into his widow's house?"

"Why not? We wanted to know the temper of that household and anything those two women might be secretly planning. Don't let her grieving fool you, Gordianus. Fulvia is still madly ambitious. So is Sempronia. Many a time I've told Caesar, 'We have to watch those two, especially the daughter. No matter that she's married to Curio, no matter that Marc Antony's married to his cousin-mark my words, Fulvia has her eye on our Antony, and if those two should ever join forces… beware!' "

I shook my head. "But for now, Antony remains married to Antonia. She saw through Cassandra's pretense."

"Yes. With Antonia, Cassandra made a grave miscalculation. She acted on her own initiative, outside her mission for Caesar."

"Not entirely her own initiative. It was Cytheris who put her up to making a distressing prophecy to Antonia."

"I know. Cassandra confessed as much to me when I pressed her. She said that Cytheris had known her in Alexandria, and threatened to expose her if she didn't do a favor for her. Cassandra argued that her prophecy to Antonia was only a small matter. I disagreed, and I chastised her quite severely for destroying any chance to build a bond of trust with Antonia. That was stupid of Cassandra, and certainly not a part of Caesar's plan. It was also my first indication that Cassandra seemed to be slipping out of my control."

"Only the first indication?"

"Her affair with you was another. That should never have happened. She knew from the beginning that she was not to form any such bond with any man while she was in Caesar's employ."

"Her time with me was not a part of Caesar's plan?"

Calpurnia looked at me shrewdly. "You're worried that it might have been otherwise? That perhaps Cassandra sought you out and seduced you merely to gain your confidence? No. Not in her role as Caesar's agent. She was acting on her own initiative when she formed whatever bond grew between you."

"How is it that you know about it, then?"

She smiled. "Purely by surmise. Why else would you have shown such an interest in Cassandra after her death, unless you were her lover?"

I made no reply.

She shrugged. "Who can explain the mysteries of Venus? Cassandra managed to keep your affair a secret even from me; that's why she could never bring you here, where the two of you would have been much more comfortable than in that hovel in the Subura. You were her little secret, just as she was yours." Calpurnia looked at me thoughtfully. "To be sure, even before Cassandra met you, she knew who you were from the very thorough briefings Caesar gave her. And of course, she was acquainted with your son-with Meto, I mean. Meto was present at some of those briefings. That young man has a flair for this sort of thing-playacting, secret codes, hatching plots under the rose."

"Cassandra knew Meto? She never told me."

"How could she, without giving away the fact that she was Caesar's agent? To have told you would have exposed you to the same dangers she faced. You might have shared her fate."

"Her fate." I tasted the word like wormwood on my tongue. "Do you know who killed her?" I asked, half suspecting now that it must have been Calpurnia herself.

She read the look on my face. "I had nothing to do with her death. I don't know who killed her or why. It might have been any of those women who came to see her burn. It might have been someone else. But…"

"Yes?"

She rose from her chair, strode to the painting of Alexander, and peered at it intently, though she must have seen it many times before. "When he was briefing Cassandra about various women in Rome, Caesar himself suggested specific prophecies or visions that she might use in order to gain a particular woman's confidence or frighten her or otherwise get her to speak what was on her mind. He did so in the case of Fulvia, as I've told you. But Caesar couldn't foresee every eventuality. After he left Rome, when a woman sought out Cassandra for her gift, in most cases Cassandra had to improvise, using her own skills and whatever she already knew about that woman.

"But circumstances change. Cassandra needed to be kept abreast of developments. That job fell to me whenever I met with her in this house. One such development was this business with Marcus Caelius and Milo. Even Caesar didn't foresee that Caelius would turn against him or that Milo would dare to return to Italy-and no one imagined that the two of them might join forces. Trebonius and Isauricus-what a pair of bunglers! They should have put a stop to Caelius the moment he set up his chair of state in the Forum and began to agitate the mob. Now the situation is out of control." She looked at me sharply. "Did you know that Caelius and Milo were both in the city as recently as the day Cassandra died?"

I answered carefully. "I heard a rumor in the Forum that the two of them were seen riding out together that morning, heading south."

"That rumor was true. That day was our last chance to stop Caelius and Milo from trying to raise a revolution in the south. I had hoped to do so using Cassandra."

"How could Cassandra have stopped them?"

"By using her gift, of course."

"Why would either of them have listened to Cassandra?"

"Caelius might not have taken her seriously, but according to my sources, Milo might very well have heeded her. I'm told that he's grown increasingly superstitious in recent years. He looks for omens and portents everywhere. If Milo could have been convinced by Cassandra to abandon this mad enterprise, Caelius might well have abandoned it as well."

"But even if Caelius and Milo were secretly in the city for a while, how could Cassandra possibly have gained access to either of them?"

"The building in the Subura where she stayed was one of Caelius's strongholds in the city. That's why I placed her there, thinking it might eventually lead to some way for her to spy on Caelius. Certainly it made her accessible to him should he ever wish to call on her. And Cassandra might also have reached either Milo or Caelius through the two women closest to them-Fausta and Clodia."

I shook my head. "Fausta may still be Milo's wife, but she despises him. She wishes him dead. She told me so. Would Milo even bother to contact Fausta while he was in the city? As for Clodia, surely there's no one she hates more than Caelius-unless it's Milo! Clodia and Caelius may once have been lovers, but I can't imagine that she's even spoken to him since the prosecution she mounted against him."

"You might think these things, Gordianus, but you would be wrong. According to my sources, Milo almost certainly contacted Fausta while he was in Rome. As for Clodia, she's been receiving Caelius at her house on the Palatine and at her horti on the Tiber for months, ever since he returned from Spain with Caesar."

"I don't believe it!"

"Do believe it, Gordianus. My sources for that fact are quite reliable."

"Are you suggesting that Clodia and Caelius renewed their love affair, after all these years, despite the bitterness between them? Impossible!"