A vampire holding a breakfast tray greeted me the next morning after my shower.

"I told Marthe you wanted to work this morning," Matthew explained, lifting the cover that was keeping the food warm.

"You two are spoiling me." I unfolded the napkin waiting on a nearby chair.

"I don't think your character is in any real danger."

Matthew stooped and gave me a lingering kiss, his eyes smoky. "Good morning. Did you sleep wel ?"

"Very wel ." I took the plate from his hands, my cheeks reddening at the memory of the invitation I'd extended to him last night. There was stil a twinge of hurt when I recal ed his gentle rebuff, but this morning's kiss confirmed that we had slipped past the limits of friendship and were moving in a new direction.

After my breakfast we headed downstairs, turned on our computers, and got to work. Matthew had left a perfectly ordinary nineteenth-century copy of an early English translation of the Vulgate Bible on the table next to his manuscript.

"Thank you," I cal ed over my shoulder, holding it up.

"I found it downstairs. Apparently the one I have isn't good enough for you." He grinned.

"I absolutely refuse to treat a Gutenberg Bible as a reference book, Matthew." My voice came out more sternly than anticipated, making me sound like a schoolmarm.

"I know the Bible backwards and forwards. If you have a question, you could just ask me," he suggested.

"I'm not using you as a reference book either."

"Suit yourself," he said with a shrug and another smile.

With my computer at my side and an alchemical manuscript before me, I was soon absorbed in reading, analyzing, and recording my ideas. There was one distracting incident when I asked Matthew for something to weight down the book's pages while I typed. He rummaged around and found a bronze medal with the likeness of Louis XIV on it and a smal wooden foot that he claimed came from a German angel. He wouldn't surrender the two objects without sureties for their return. Final y he was satisfied by several more kisses.

Aurora Consurgens was one of the most beautiful texts in the alchemical tradition, a meditation on the female figure of Wisdom as wel as an exploration of the chemical reconciliation of opposing natural forces. The text in Matthew's copy was nearly identical to the copies I'd consulted in Zurich, Glasgow, and London. But the il ustrations were quite different.

The artist, Bourgot Le Noir, had been a true master of her craft. Each il umination was precise and beautiful y executed. But her talent did not lie simply in technical mastery. Her depictions of the female characters showed a different sensibility. Bourgot's Wisdom was ful of strength, but there was a softness to her as wel . In the first il umination, where Wisdom shielded the personification of the seven metals in her cloak, she bore an expression of fierce, maternal pride.

There were two il uminations-just as Matthew had promised-that weren't included in any known copy of Aurora Consurgens. Both appeared in the final parable, devoted to the chemical wedding of gold and silver. The first accompanied words spoken by the female principle in alchemical change. Often represented as a queen dressed in white with emblems of the moon to show her association with silver, she had been transformed by Bourgot into a beautiful, terrifying creature with silvery snakes instead of hair, her face shadowed like a moon eclipsed by the sun.

Silently I read the accompanying text, translating the Latin into English: "Turn to me with all your heart. Do not refuse me because I am dark and shadowed. The fire of the sun has altered me. The seas have encompassed me. The earth has been corrupted because of my work. Night fell over the earth when I sank into the miry deep, and my substance was hidden."

The Moon Queen held a star in one outstretched palm.

"From the depths of the water I cried out to you, and from the depths of the earth I will call to those who pass by me,"

I continued. "Watch for me. See me. And if you find another who is like me, I will give him the morning star."

My lips formed the words, and Bourgot's il umination bought the text to life in the Moon Queen's expression that showed both her fear of rejection and her shy pride.

The second unique il umination came on the next page and accompanied the words spoken by the male principle, the golden Sun King. The hair on my neck rose at Bourgot's depiction of a heavy stone sarcophagus, its lid open just enough to reveal a golden body lying within. The king's eyes were closed peaceful y, and there was a look of hope on his face as if he were dreaming of his release. "I will rise now and go about the city. In its streets I will seek out a pure woman to marry," I read, "her face beautiful, her body more beautiful, her raiment most beautiful. She will roll away the stone from the entrance of my tomb and give me the wings of a dove so that I might fly with her to the heavens to live forever and be at rest." The passage reminded me of Matthew's badge from Bethany and Lazarus's tiny silver coffin. I reached for the Bible.

"Mark 16, Psalms 55, and Deuteronomy 32, verse 40."

Matthew's voice cut through the quiet, spouting references like an automated biblical concordance.

"How did you know what I was reading?" I twisted in my chair to get a better view of him.

"Your lips were moving," he replied, staring fixedly at his computer screen, his fingers clattering on the keys.

Pressing my lips together I returned to the text. The author had drawn on every biblical passage that fit the alchemical story of death and creation, paraphrasing and cobbling them together. I pul ed the Bible across the desk. It was bound in black leather and a gold cross adorned the cover. Opening it to the Gospel of Mark, I scanned chapter 16. There it was, Mark 16:3, "And they said one to another: Who shall roll us back the stone from the door of the sepulchre?"

"Find it?" Matthew inquired mildly.

"Yes."

"Good."

The room grew silent once more.

"Where's the verse about the morning star?" Sometimes my pagan background was a serious professional liability.

"Revelation 2, verse 28."

"Thank you."

"My pleasure." A smothered laugh came from the other desk. I bent my head to the manuscript and ignored it.

After two hours of reading tiny, Gothic handwriting and searching for corresponding biblical references, I was more than ready to go riding when Matthew suggested it was time for a break. As an added bonus, he promised to tel me over lunch how he knew the seventeenth-century physiologist Wil iam Harvey.

"It's not a very interesting story," Matthew had protested.

"Maybe not to you. But to a historian of science? It's the closest thing I'l get to meeting the man who figured out that the heart is a pump."

We hadn't seen the sun since we'd arrived at Sept- Tours, but neither of us minded. Matthew seemed more relaxed, and I was surprisingly happy to be out of Oxford.

Gil ian's threats, the picture of my parents, even Peter Knox -they al receded with each hour that passed.

As we walked out into the gardens, Matthew chatted animatedly about a problem at work that involved a missing strand of something that should have been present in a blood sample but wasn't. He sketched out a chromosome in the air in an effort to explain, pointing to the offending area, and I nodded even though what was at stake remained mysterious. The words continued to rol out of his mouth, and he put an arm around my shoulder, drawing me close.

We rounded a line of hedges. A man in black stood outside the gate we'd passed through yesterday on our ride. The way he leaned against a chestnut tree, with the elegance of a leopard on the prowl, suggested he was a vampire.

Matthew scooped me behind him.

The man pul ed himself graceful y away from the tree's rough trunk and strol ed toward us. The fact that he was a vampire was now confirmed by his unnatural y white skin and huge, dark eyes, emphasized by his black leather jacket, jeans, and boots. This vampire didn't care who knew he was different. His wolfish expression was the only imperfection in an otherwise angelic face, with symmetrical features and dark hair worn curling low onto his col ar. He was smal er and slighter than Matthew, but the power he exuded was undeniable. His eyes sent coldness deep under my skin, where it spread like a stain.

"Domenico," Matthew said calmly, though his voice was louder than usual.

"Matthew." The glance the vampire turned on Matthew was ful of hate.

"It's been years." Matthew's casual tone suggested that the vampire's sudden appearance was an everyday occurrence.

Domenico looked thoughtful. "When was that? In Ferrara? We were both fighting the pope-though for different reasons, as I remember. I was trying to save Venice. You were trying to save the Templars."

Matthew nodded slowly, his eyes fixed on the other vampire. "I think you must be right."

"After that, my friend, you seemed to disappear. We shared so many adventures in our youth: on the seas, in the Holy Land. Venice was always ful of amusements for a vampire such as you, Matthew." Domenico shook his head in apparent sorrow. The vampire inside the chateau gate did look Venetian-or like some unholy cross between an angel and a devil. "Why did you not come and visit me when you passed between France and one of your other haunts?"

"If I caused offense, Domenico, it was surely too long ago to be of any concern to us now."

"Perhaps, but one thing hasn't changed in al these years.

Whenever there's a crisis, there's a de Clermont nearby."

He turned to me, and something avaricious bloomed on his face. "This must be the witch I've heard so much about."

"Diana, go back to the house," Matthew said sharply.

The sense of danger was palpable, and I hesitated, not wanting to leave him alone.

"Go," he said again, his voice as keen edged as a sword.

Our vampire visitor spotted something over my shoulder and smiled. An icy breeze brushed past me and a cold, hard arm linked through mine.

"Domenico," chimed Ysabeau's musical voice. "What an unexpected visit."

He bowed formal y. "My lady, it is a pleasure to see you in such good health. How did you know I was here?"

"I smel ed you," Ysabeau said contemptuously. "You come here, to my house, uninvited. What would your mother say if she knew you behaved in such a fashion?"

"If my mother was stil alive, we could ask her," Domenico said with barely concealed savagery.

"Maman, take Diana back to the house."

"Of course, Matthew. We wil leave the two of you to talk."

Ysabeau turned, tugging me along with her.

"I'l be gone more quickly if you let me deliver my message," Domenico warned. "If I have to come back, I won't be alone. Today's visit was a courtesy to you, Ysabeau."

"She doesn't have the book," Matthew said sharply.

"I'm not here about the witches' damned book, Matthew.

Let them keep it. I've come from the Congregation."

Ysabeau exhaled, soft and long, as if she'd been holding her breath for days. A question burbled to my lips, but she silenced it with a warning look.

"Wel done, Domenico. I'm surprised you have the time to cal on old friends, with al your new responsibilities."

Matthew's voice was scornful. "Why is the Congregation wasting time paying official visits on the de Clermont family when there are vampires leaving bloodless corpses al over Europe for humans to find?"

"It's not forbidden for vampires to feed on humans- though the carelessness is regrettable. As you know, death fol ows vampires wherever we go." Domenico shrugged off the brutality, and I shivered at his casual disregard for frail, warmblooded life. "But the covenant clearly forbids any liaison between a vampire and a witch."

I turned and stared at Domenico. "What did you say?"

"She can speak!" Domenico clasped his hands in mock delight. "Why not let the witch take part in this conversation?"

Matthew reached around and drew me forward. Ysabeau remained entwined through my other arm. We stood in a short, tight line of vampire, witch, and vampire.

"Diana Bishop." Domenico bowed low. "It's an honor to meet a witch of such ancient, distinguished lineage. So few of the old families are stil with us." Every word he uttered- no matter how formal y phrased-sounded like a threat.

"Who are you?" I asked. "And why are you concerned with whom I spend time?"

The Venetian looked at me with interest before his head fel back and he howled with laughter. "They said you were argumentative like your father, but I didn't believe them."

My fingers tingled slightly, and Ysabeau's arm grew fractional y tighter.

"Have I made your witch angry?" Domenico's eyes were fixed on Ysabeau's arm.

"Say what you came to say and get off our land."

Matthew's voice was entirely conversational.

"My name is Domenico Michele. I have known Matthew since I was reborn, and Ysabeau nearly as long. I know neither of them so wel as I knew the lovely Louisa, of course. But we should not speak lightly of the dead." The Venetian crossed himself piously.

"You should try not to speak of my sister at al ." Matthew sounded calm, but Ysabeau looked murderous, her lips white.

"You stil haven't answered my question," I said, drawing Domenico's attention once more.

The Venetian's eyes glittered with frank appraisal.

"Diana," Matthew said, unable to stop the rumble in his throat. It was as close as he'd ever been to growling at me.

Marthe came out of the kitchens, a look of alarm on her face.

"She is more fiery than most of her kind, I see. Is that why you're risking everything to keep her with you? Does she amuse you? Or do you intend to feed on her until you get bored and then discard her, as you have with other warmbloods?"

Matthew's hands strayed to Lazarus's coffin, evident only as a bump under his sweater. He hadn't touched it since we'd arrived in Sept-Tours.

Domenico's keen eyes noticed the gesture, too, and his answering smile was vindictive. "Feeling guilty?"

Furious at the way Domenico was baiting Matthew, I opened my mouth to speak.

"Diana, go back to the house immediately." Matthew's tone suggested that we would have a serious, unpleasant talk later. He pushed me slightly in Ysabeau's direction and put himself even more squarely between his mother, me, and the dark Venetian. By that time Marthe was nearby, her arms crossed over her sturdy body in a striking imitation of Matthew.

"Not before the witch hears what I have to say. I have come to serve you with a warning, Diana Bishop.

Relationships between witches and vampires are forbidden. You must leave this house and no longer associate with Matthew de Clermont or any of his family. If you don't, the Congregation wil take whatever steps are necessary to preserve the covenant."

"I don't know your Congregation, and I agreed to no such covenant," I said, stil furious. "Besides, covenants aren't enforceable. They're voluntary."

"Are you a lawyer as wel as a historian? You modern women with your fine educations are so fascinating. But women are no good at theology," Domenico continued sorrowful y, "which is why we never thought it worth educating you in the first place. Do you think we adhered to the ideas of that heretic Calvin when we made these promises to one another? When the covenant was sworn, it bound al vampires, daemons, and witches-past, present, and future. This is not a path you can fol ow or not as you please."

"You've delivered your warning, Domenico," Matthew said in a voice like silk.

"That's al I have to say to the witch," the Venetian replied.

"I have more to say to you."

"Then Diana wil return to the house. Get her out of here, Maman, " he said tersely.

This time his mother did what he asked immediately, and Marthe fol owed. "Don't," Ysabeau hissed when I turned to look back at Matthew.

"Where did that thing come from?" Marthe asked once we were safely inside.

"From hel , presumably," said Ysabeau. She touched my face briefly with her fingertips, drawing them back hastily when they met the warmth of my angry cheeks. "You are brave, girl, but what you did was reckless. You are not a vampire. Do not put yourself at risk by arguing with Domenico or any of his al ies. Stay away from them."

Ysabeau gave me no time to respond, speeding me through the kitchens, the dining room, the salon, and into the great hal . Final y she towed me toward the arch that led to the keep's most formidable tower. My calves seized up at the thought of the climb.

"We must," she insisted. "Matthew wil be looking for us there."

Fear and anger propel ed me halfway up the stairs. The second half I conquered through sheer determination.

Lifting my feet from the final tread, I found myself on a flat roof with a view for miles in every direction. A faint breeze blew, loosening my braided hair and coaxing the mist around me.

Ysabeau moved swiftly to a pole that extended another dozen feet into the sky. She raised a forked black banner adorned with a silver ouroboros. It unfurled in the gloomy light, the snake holding its shimmering tail in its mouth. I ran to the far side of the crenel ated wal s, and Domenico looked up.

Moments later a similar banner rose over the top of a building in the vil age and a bel began to tol . Men and women slowly came out of houses, bars, shops, and offices, their faces turned toward Sept-Tours, where the ancient symbol of eternity and rebirth snapped in the wind. I looked at Ysabeau, my question evident on my face.

"Our family's emblem, and a warning to the vil age to be on their guard," she explained. "We fly the banner only when others are with us. The vil agers have grown too accustomed to living among vampires, and though they have nothing to fear from us, we have kept it for times such as this. The world is ful of vampires who cannot be trusted, Diana. Domenico Michele is one of them."

"You didn't need to tel me that. Who the hel is he?"

"One of Matthew's oldest friends," Ysabeau murmured, eyes on her son, "which makes him a very dangerous enemy."

My attention turned to Matthew, who continued to exchange words with Domenico across a precisely drawn zone of engagement. There was a blur of black and gray movement, and the Venetian hurtled backward toward the chestnut tree he'd been leaning against when we first spotted him. A loud crack carried across the grounds.

"Wel done," Ysabeau muttered.

"Where's Marthe?" I looked over my shoulder toward the stairs.

"In the hal . Just in case." Ysabeau's keen eyes remained fixed on her son.

"Would Domenico real y come in here and rip my throat open?"

Ysabeau turned her black, glittering gaze on me. "That would be al too easy, my dear. He would play with you first.

He always plays with his prey. And Domenico loves an audience."

I swal owed hard. "I'm capable of taking care of myself."

"You are, if you have as much power as Matthew believes. Witches are very good at protecting themselves, I've found, with a little effort and a drop of courage,"

Ysabeau said.

"What is this Congregation that Domenico mentioned?" I asked.

"A council of nine-three from each order of daemons, witches, and vampires. It was established during the Crusades to keep us from being exposed to the humans.

We were careless and became too involved in their politics and other forms of insanity." Ysabeau's voice was bitter.

"Ambition, pride, and grasping creatures like Michele who were never content with their lot in life and always wanted more-they drove us to the covenant."

"And you agreed to certain conditions?" It was ludicrous to think that promises made by creatures in the Middle Ages could affect Matthew and me.

Ysabeau nodded, the breeze catching a few strands of her heavy, honeyed hair and moving them around her face.

"When we mixed with one another, we were too conspicuous. When we became involved in human affairs, they grew suspicious of our cleverness. They are not quick, the poor creatures, but they are not entirely stupid either."

"By 'mixing,' you don't mean dinners and dancing."

"No dinners, no dancing-and no kissing and singing songs to each other," Ysabeau said pointedly. "And what comes after the dancing and the kissing was forbidden as wel . We were ful of arrogance before we agreed to the covenant. There were more of us, and we'd become accustomed to taking whatever we wanted, no matter the cost."

"What else does this promise cover?"

"No politics or religion. Too many princes and popes were otherworldly creatures. It became more difficult to pass from one life to the next once humans started writing their chronicles." Ysabeau shuddered. "Vampires found it difficult to feign a good death and move on to a new life with humans nosing around."

I glanced quickly at Matthew and Domenico, but they were stil talking outside the chateau's wal s. "So," I repeated, ticking items off my fingers. "No mixing between different types of creatures. No careers in human politics or religion. Anything else?" Apparently my aunt's xenophobia and fierce opposition to my studying the law derived from her imperfect understanding of this long-ago agreement.

"Yes. If any creature breaks the covenant, it is the responsibility of the Congregation to see that the misconduct is stopped and the oath is upheld."

"And if two creatures break the covenant?"

The silence stretched taut between us.

"To my knowledge it has never happened," she said grimly. "It is a very good thing, therefore, that the two of you have not done so."

Last night I'd made a simple request that Matthew join me in my bed. But he'd known it wasn't a simple request. It wasn't me he was unsure of, or his feelings. Matthew wanted to know how far he could go before the Congregation would intervene.

The answer had come quickly. They weren't going to let us get very far at al .

My relief was quickly replaced by anger. Had no one complained, as our relationship developed, he might never have told me about the Congregation or the covenant. And his silence would have had implications for my relationship with my own family, and with his. I might have gone to my grave believing that my aunt and Ysabeau were bigots.

Instead they were living up to a promise made long ago- which was less understandable but somehow more excusable.

"Your son needs to stop keeping things from me." My temper rose, the tingling mounting in my fingertips. "And you should worry less about the Congregation and more about what I'm going to do when I see him again."

She snorted. "You won't get the chance to do much before he takes you to task for questioning his authority in front of Domenico."

"I'm not under Matthew's authority."

"You, my dear, have a great deal to learn about vampires," she said with a note of satisfaction.

"And you have a great deal to learn about me. So does the Congregation."

Ysabeau took me by the shoulders, her fingers digging into the flesh of my arms. "This is not a game, Diana!

Matthew would wil ingly turn his back on creatures he has known for centuries to protect your right to be whatever you imagine you want to be in your fleeting life. I'm begging you not to let him do it. They wil kil him if he persists."

"He's his own man, Ysabeau," I said coldly. "I don't tel Matthew what to do."

"No, but you have the power to send him away. Tel him you refuse to break the covenant for him, for his sake-or that you feel nothing more for him than curiosity-witches are famous for it." She flung me away. "If you love him, you'l know what to say."

"It is over," Marthe cal ed from the top of the stairs.

We both rushed to the edge of the tower. A black horse and rider streaked out of the stables and cleared the paddock fence before thundering into the forest.