"I am Acatl, High Priest for the Dead, and I speak for my temple and my clergy. Do you think it wise to stand against me?" I closed my good hand on the strongest obsidian knife, letting the emptiness of Mictlan well up to fill me.

Her face remained expressionless, though she had to see the power coursing to me. "I will talk to the Fire Priest. Wait here."

I did so. A breeze had risen over the lake, cold on my exposed skin. The mist would not dissipate. Was it just my fancy, or was something swimming in the water, near the bottom of the rise?

Two lights surfaced, briefly: yellow eyes, I realised with a shock. They were watching me with undisguised malice. The ahuizotl. It hadn't been there while Teomitl and I were on the lake, although Teomitl's warding magic might have kept it away. But it was the first time a water-beast had ever swum after me. Why wouldn't it go away?

I was wounded, smelling of blood, and reeking of the underworld magic I had been consorting with all night. To any magical creature, I would be a beacon.

But there was still something about it that made me uneasy. The ahuizotls belonged to Chalchiutlicue, and surely it was more than a coincidence that Huei had summoned them, and then found refuge in a temple to the goddess?

"Acatl-tzin," someone said.

Startled, I turned around. The priestess had come back with a man: a priest of far higher rank, judging by his diadem of heron feathers and the drops of melted rubber that darkened his face.

"I am Eliztac, Fire Priest of this modest temple. I'm told that you seek someone." He exuded the same coiled power as the walls of his temple: a rippling light that seemed to be an extension of the starlight over the lake.

"My brother's wife, Huei," I said, giving him a brief description. Although, by the gleam in his eyes, he had no need of it.

"I see," Eliztac said, but ventured no comment.

"Understand this," I said, exasperated by yet another delay a by the knowledge that Huei was alive, so close to me a and yet out of my reach. "I know she came here, and I know she hasn't left. We can talk all night, or you can save some time and admit to having seen her."

Eliztac pursed his lips, thoughtfully.

"She has transgressed against Mictlan," I added, for good measure.

His gaze was disturbingly shrewd. "But is no longer, I think, your rightful prey."

"Why would you prevent me from entering?" I asked. I tightened my grip on the obsidian knife. The emptiness rising in my chest was almost comforting, a shield against all I couldn't face.

He sighed. "You're right. It's late. Let's not dance around each other like warriors on the gladiator stone. The person you want did come here a but you cannot see her."

"I still don't seea"

Eliztac raised a hand. "She has given herself to the goddess."

There could only be one meaning for this. But I still had to ask, to be sure. I might have misunderstood. "As a sacrifice?"

Eliztac nodded. "She is Chalchiutlicue's now. She's removed herself from the Fifth World. Neither you nor anyone else has a claim on her."

"When?" I asked plainly.

"When the proper stars are aligned and the proper omens have happened," Eliztac said. "It will take time. One, two years? Only the goddess knows."

One, two years. Huei still had time. But, as she learnt the dance, and the proper rituals for the sacrifice, she would never forget what was to come: the knowledge of her death would mingle with every moment she spent in the temple.

The Southern Hummingbird cut her down! How could she...? But, of course, once she had summoned the beast of shadows, she wouldn't have had a choice, not any more.

"I have to speak to her," I said.

Eliztac shook his head, forcefully. The heron feathers swayed to and fro, like white flags in the darkness. "She no longer belongs in this world."

"There are some things I need to know..."

"She fled from you," Eliztac said. "What makes you think she would talk to you?"

I said, "She's still family." In spite of everything, she was still the gangly girl my brother had brought home, all those years ago: the one who'd smile and shake her head whenever Neutemoc and I tried to make her take sides. The one who would die, drowned by the priests in order to bring the Jade Skirt's favour to the Empire.

Eliztac looked away from me, for a moment. "If you were her husband, it would be a different matter. But as it is, I can't allow it."

"Please," I said.

But he shook his head. "Forget her, Acatl-tzin. The goddess will take her as Her own, and lead her into the Blessed Land of the Drowned."

It was, I supposed, preferable to what would happen to Huei if the Wind of Knives took her. Lord Death dealt harshly with those who sought to use His powers.

I could have begged and pleaded with Eliztac, but it would only have demeaned me. He had made his decision, and I would gain nothing by attempting to make him go back on it.

Entering the temple without his permission was tantamount to suicide: in my present state, I didn't have the power to hide myself from Chalchiutlicue's magic, and I didn't want to know the fate the temple reserved to trespassers.

"Thank you," I said, and walked back to Oyohuaca's boat.

The ahuizotl watched me from the water, a dark, lean shape whispering its seducing song. It followed us all the way home.

Neutemoc's house was bathed in the grey light before dawn; and the slaves were already getting up to grind the maize flour. I found my sister, Mihmatini, in the reception room, playing patolli with one of the slaves. She was sitting on a reed mat, listlessly throwing the white bean dice on the board and picking them up again, but clearly making no effort to focus on the moves of her pebbles.

Mihmatini looked up when I entered. "Acatl!" Her gaze moved beyond me, focusing on Oyohuaca, who was waiting respectfully by the entrance.

"You didn't find her then," she said. Her disappointment was palpable.

I wondered what I could tell her. But if I started lying to my own sister, I had fallen very low indeed. "She's in Chalchiutlicue's temple."

Mihmatini frowned. She gestured for the slave to get out. He picked up the patolli board, dice and pebbles as he exited. "And you can't arrest her?" she asked.

I saw the instant the inescapable conclusion dawned in her mind. Her face, for a bare moment, froze into an expressionless mask. "Acatl," she whispered. "Please tell me she didn'ta"

I couldn't lie to her. "I'm sorry. It was the only way she'd be safe."

"Safe for a month or so, until they drown her?"

I sat on the mat where her patolli partner had been, facing her. "The priests said a year or two. But yes. They'll drown her in the lake." I tried to tell it as simply, as emotionlessly as I could, but I couldn't quite hide the turmoil inside me. In just a handful of days, my comfortable world had shattered. But I, at least, was alive: not in a cage like Neutemoc, not awaiting death like Huei. "They won't let me see her," I said.

Mihmatini closed her eyes and bent her head backwards, in a gesture eerily reminiscent of Father when I'd displeased him. "I don't understand why she summoned the beast," she said.

"Do you think I do?"

She snorted. "You're the investigator."

"A poor kind of investigator," I said. "It seems I can't even get hold of my suspects."

Mihmatini said nothing for a while. Her eyes were on the empty place between both our mats, and her thoughts obviously further away. Finally, she said, "What about Neutemoc?"

What about him indeed. I'd been pondering the matter on the way home, and had some ideas, but nothing definite. "The judges will hear him today. Huei would have proved his innocence," I said.

"Chalchiutlicue's temple won't even let Imperial Investigators in?" Mihmatini asked. But she knew, as I did, that the investigators could drag the priests and priestesses out and do with them as they pleased, but that someone destined for sacrifice had already removed themselves from the flow of our lives.

I asked her, carefully, "Will you bear witness for me?"

"For Neutemoc?" she asked.

"He's in an Imperial Audience, and I need evidence to get him freed."

"I'm his sister," she pointed out. "They won't believe me."

"The slaves will support you," I said.

"A slave's testimonya"

"Is receivable before the courts, unless the rules have changed." Any man could become a slave; any one could fall so low they had no choice but to sell their freedom.

Mihmatini puffed her cheeks, thoughtfully. "But the rules have changed, haven't they? No one gets so quickly moved to an Imperial Audience."

"There are complications," I admitted. "Political matters."

Mihmatini snorted. "Politics. That alone makes me glad I'm a woman."

"Women take part in politics too," I said, thinking of Eleuia.

"Less often," Mihmatini said. "Anyway." She ran a hand on her jade necklace. "I'll say what needs to be said, but I don't think it's going to be enough."

I bit my lip, thoughtfully. "Huei received two men, two days ago, in the afternoon. Can you ask the slaves if they remember them?"

Mihmatini shrugged. "I can try. But I think they were all intelligent enough to make sure they wouldn't be witnessed."

"Maybe." It was a risk we'd have to take.

"Have you found the priestess?" Mihmatini asked.

"No," I said. I should have thought of sending to Ixtli, letting him try to find a trail from the Floating Garden. Duality curse me, I'd been too obsessed with what I'd learnt about Huei to even think of using Teomitl as a messenger.

It was too late now. I'd stop at the Duality House on my way to the temple, to see what could be done. "But I don't think she's alive any more," I said to Mihmatini.

"Then you'll never find her," Mihmatini said. "Few things are as anonymous as corpses."

She'd changed. She spoke like an adult, sure of herself. And yet her face was still that of the baby sister whose first steps I'd watched. It was unsettling. Had time passed so quickly, leaving me with nothing but my sterile priest's calling as my own?

"I know," I said, quietly, unwilling to delve deeper into the subject. "But at this moment, all I need to prove is that Neutemoc didn't summon that beast of shadows. We'll see about the rest later." Such as explaining to Neutemoc what his wife had done.

"Very well," Mihmatini said. "I'll come tomorrow. At your temple?"

"Tomorrow, at midday," I said.

She nodded. "You could stay here to get some sleep, you know. You're in no state to traipse through the streets."

I heard what she wasn't telling me: that the house without either Neutemoc or Huei would be huge, filled with slaves who barely knew Mihmatini. I wished I could comfort her; but I had to go back to my temple and gather all I could to get Neutemoc freed.

"I can't," I said. "Not tonight."

Tomorrow... tomorrow, if things went well and the High Priest of Tlaloc didn't have his way, Neutemoc would be home. He'd take care of her: she was blameless in the whole matter.

Mihmatini shook her head. "You're not walking home in this state. I'll get Oyohuaca to row you back to the Sacred Precinct."

I would have protested, but in truth I felt too tired for that. I rose, now used to the sharp pain that accompanied every one of my movements, and bade her goodnight. "See you tomorrow then."

"You fool," she said as I limped into the courtyard. But her voice was more amused than angry. "Give those wounds a chance to heal."

I did not answer, and left Neutemoc's house without giving her further incentive to tease me.

Oyohuaca rowed me back to the Sacred Precinct in silence and left me by the western docks. Flotillas of reed boats, each bearing the insignia of the temple to which they belonged, bobbed in the darkness. Somewhere at the back would be the large ceremonial barge reserved for the High Priest for the Dead, its prow painted the colour of bone, its oars carved with owls and spiders.

From the docks, it was but a short walk to the Duality House; but this left me so exhausted I was thankful to Mihmatini for insisting I take a boat back to the Sacred Precinct.

The Duality House was still bustling at this hour of the night, and Ixtli still wasn't sleeping. Did he ever sleep? He listened to my account, cocking his head from time to time. "Very well," he said when I was done. "I'll take some men and go to the Floating Garden. Buta"

"I know," I said. The trail was old by now, and it was mundane, not magical. Whoever had come for Eleuia a whoever had instigated the whole affair a had had the intelligence never to handle magic themselves. Even if they did find a trail, I wouldn't have results by the next afternoon. "Do what you can," I said.