It was more unexpected than offensive. Galen had been thinking of the Thames; they said it was home to an old G.o.d, that fought the Dragon back in the days of the Great Fire. But no one had spoken with Father Thames since then, except perhaps the river fae, and maybe not even them. "Don't you need a spirit of water?"

"Water and earth are the elements a.s.sociated with sophic mercury, yes. But it is also other things: feminine, for one. And also this." Abd ar-Rashid handed another paper to him with a bow. It held a sketch, copied with painstaking care from some old woodcut, showing a richly dressed man and woman joining hands. The symbolism of both figures was clear. "As philosophic sulphur is the sun king, so is mercury the moon queen."

Lune. They called her a daughter of the moon; for all Galen knew, it was literally true. She certainly looked the part. Abd ar-Rashid was right; that wasn't an answer Galen wished to hear. "She's already fought the Dragon once, sir, and been wounded badly for it. But no-we aren't talking of fighting, are we? So you would want to-"

It died in his throat. Abd ar-Rashid said, "As I understand it, sophic sulphur was obtained by cutting the heart of the Dragon from its body. The obvious answer would be to obtain sophic mercury the same way."

Galen set the paper down with excessive care. "Obvious, perhaps-but not acceptable." He'd promised not to punish the genie for speaking; he had to hold to that. Whatever he felt inside.

Abd ar-Rashid held up a mollifying hand. "And this is why I asked to speak in private, Lord Galen. Others will think of this. The image of the moon queen is widespread in European alchemy; no one can look into the matter without encountering it. And the connection to her Grace is clear. If it is not too presumptuous of me to say-be very cautious with whom you share this plan."

The door opened, and Galen almost jumped out of his skin. But it was only Edward, bringing in the tray with its coffee and bowls. Galen dismissed the valet and poured for himself and the genie both, needing the coffee to steady his own hands. "Thank you," he murmured, out of sheer habit. "I will. Be cautious, that is. You said this is a thing of European alchemy-does Arabic practice offer an alternative?"

"If it did, I would have presented it to you already," the genie said, with obvious regret.

Then they would have to find their own alternative. Some other source for the mercury, or a way to obtain it without harming Lune. Surely there would be something.

Galen burnt his tongue on the coffee, hissed in pain, and set it down. "May I see those papers?" Abd ar-Rashid handed them over with a bow. A quick perusal told him very little; his Latin and Greek were even rustier than his French, and the Arabic escaped him entirely. "Translate these for me, if you will. The original we will keep in strictest security; my copy will be shown only to a very few."

"Dr. Andrews?"

The man had such hopes for this plan. Galen could not blame him; the philosopher's stone was said to cure all ills. Including, perhaps, consumption. But under no circ.u.mstances would Galen allow Lune to come to harm. "I'll tell him myself. The Queen will decide what to say to the court as a whole."

The genie bowed again, accepting the papers back. "I trust to your wisdom, Lord Galen."

The Onyx Hall, London: October 31, 1758 After her visit to the Grecian, Irrith was ashamed to be offered a position among the Queen's ladies when they rode out on All Hallows' Eve.

It was an ancient tradition; not even the concerns of the Sanists, that it wasn't safe for Lune to absent herself from the Onyx Hall, could put a halt to it. All Hallows' Eve was one of the great nights of their year, and Lune had duties she must maintain. Tasking them to another would only create more fear than her departure from the palace ever could.

Riding with the Queen was the sacred part of the tradition, if that word could be used for a faerie activity. Others in the Onyx Court would find their own, coa.r.s.er amus.e.m.e.nts. This was the dark mirror to Midsummer's gentle diversion. Black things would happen tonight, frights and horrors and hauntings, with the court's goblins leading the way. But while they entertained themselves in the streets, Lune and her companions would ride above, collecting the ghosts of the dead.

Hairy How, the Lord Treasurer, distributed bread to them all. Irrith ate hers slowly, feeling the mortal weight upon her tongue. Such labor went into it: the farmer in his field, planting and reaping the grain; the miller grinding it to flour; the country housewife mixing and kneading and baking it into bread. Or perhaps this was one of Dr. Andrews's t.i.thed loaves, bought in a London marketplace, or carried from house to house by a street-seller. So many humans, doing so much work-and how many of them knew of the fae who ate the result?

A few more, if they looked up at the right moment tonight. But grand faerie spectacle had gone out of fashion with the Puritans; even now, when folk went rambling in the countryside on Sundays instead of attending church, it wasn't wise to draw too much attention. They would ride because the fae owed a duty to the dead, not because they wished to announce their presence to London.

"You'll have new chance to mock my riding skills tonight."

Irrith jumped. When the Queen rarely went anywhere without a host of attendants, it was easy to forget that she could move very quietly indeed. Lune stood behind Irrith, wearing a riding habit of black. She only wore the color on All Hallows' Eve. It cast a grim pall over her usual serenity.

A pall that was somewhat countered by the dog frolicking at her side. Teyrngar, a cream-coated faerie hound, knew full well what night it was, but the solemnity mattered less to him than the chance to run free. Smiling, Lune scratched behind his red ears.

With her good hand, of course. The left, as always, hung in a stiffened claw. Irrith wondered if it hurt her, as the iron wound surely did.

Belatedly she remembered her manners and dropped into a curtsy. "I would never mock you, your Majesty."

Lune's smile turned wistful. "You used to. I confess a part of me misses it."

It was true that the Queen was a terrible rider. Living in the Onyx Hall, she rarely had cause to sit a horse. But the terrible weight of knowledge and doubt inside Irrith's head made her reluctant to open her mouth, for fear something might slip out that shouldn't.

"Ride alongside me," Lune said, taking Irrith's arm with her good hand. "Then you can catch me if I fall."

If she fell, it would be the fault of her mount. The tatterfoals and brags changed before they pa.s.sed through the Old Fish Street arch into London, dropping to all fours and growing into horse shape. But the arch was too low to admit a rider, and so they went in pairs into the small courtyard outside, where the riders climbed astride and rode out onto the larger street. When their company had formed up, all thirteen riders and the hound, well masked by charms, Lune gave the command-and they leapt into the sky.

The surge took Irrith's breath away with delight. It's been too long since I rode beneath the moon. It's been too long since I rode beneath the moon. Not that there was any moon now; it was in its dark phase, and the ever-present clouds veiled the stars. The only real light came from London below, lanterns marking the better streets, candles burning late into the night. Not that there was any moon now; it was in its dark phase, and the ever-present clouds veiled the stars. The only real light came from London below, lanterns marking the better streets, candles burning late into the night. Still. Free air-above the coal smoke for once-and a horse beneath me, and no politics to concern us. Still. Free air-above the coal smoke for once-and a horse beneath me, and no politics to concern us.

Old Fish Street was the easiest pa.s.sage for horse-shaped beings, but they had to ride east to begin the night's work. Irrith marveled as she saw how far the city stretched: past the Tower, past the docks, houses stringing out along the river, the water clogged with ships at anchor. "Wapping," Lune said at one point, nodding downward; that was where Abd ar-Rashid lived. Though he was more in the Onyx Hall than not, lately-him and the mortal doctor both.

When they'd reached Lune's chosen point, she gave the command, and they turned westward once more. Irrith's gaze swept the ground below, seeking the telltale flickers that would indicate a ghost. A goblin in the Vale had said once this ritual was like a housewife sweeping her floor: it didn't get all the dirt, but without the effort, filth-or ghosts-would pile up until there was no living among them. With the number of people London held, she imagined they had more shades than most.

Cries rose from three throats at once, but Irrith was the first to move. Her horse swooped downward, carrying her with terrifying speed toward a dingy house. Irrith leaned sideways in her saddle, hand out, and concentrated as she skimmed over the battered roof tiles. Goblins were better at this than sprites, but she was here first, and she was determined not to miss.

A feeling snagged her fingers, like fog. She seized hold and wrenched upright, and when her mount leapt upward once more, a tattered wisp of white trailed from her fist. It moaned as she rejoined the company above, bearing their first catch of the night. "My child," the dead woman sobbed, face rippling in the wind. "Oh, my poor child, lost, lost..."

"What happened to your child?" Irrith asked, but the ghost showed no sign of hearing her.

"Few of them will converse," Lune said. The Queen made a regal figure on her white tatterfoal-so long as you ignored her good hand's desperate clutch on the reins. "The ones with that awareness often resist joining us, because they know they must go on at the end of the night."

Teyrngar dove to retrieve a second ghost. "What makes them stay?" Irrith asked, studying the ground once more. "Any of them-the ones we clear away each year, or the ones that go on haunting. These aren't all all the dead mortals; we'd have to sweep the city every week for that." The children alone would form a train to the far horizon. the dead mortals; we'd have to sweep the city every week for that." The children alone would form a train to the far horizon.

Lune shook her head, gazing out over the city with a melancholy air. "Any number of things. Love for kin who still remain-that seems the most common. Sometimes it's hatred instead, especially among those who were murdered. Or attachment to material things, their wealth or their home... anything a human cares pa.s.sionately about can tie them to this world."

Riders flew up and down, harvesting the night's crop. Already they'd gathered enough ghosts that Irrith couldn't get an accurate count, and they were only now pa.s.sing the Tower again, heading west. The eastern end of London had contained a great many specters. "Or interaction with faeries," Irrith said.

"Yes," Lune said softly. "Sometimes."

Thinking of her dead lover, no doubt. Irrith wished he'd had the consideration to die in the spring, further from All Hallows' Eve. Or to leave a ghost, so Lune would have him in some form.

She went down several times more, but the goblins, annoyed by her early victory, outraced her to most of the ghosts. Irrith ended up mostly riding by the Queen, sighting the shades for others to catch. After calling out three in quick succession, she said, "I've often wondered what it must be like, knowing there's something after death. h.e.l.l wouldn't be so pleasant, of course, but there's always the chance of Heaven-and maybe something, however bad, is better than nothing at all."

A howl snapped her attention downward. The fetch Nithen rode toward them, cackling, one hand dragging a struggling ghost by the scruff of his neck. That one, it seemed, was not happy to leave. Perhaps he knew he was destined for h.e.l.l.

She almost missed Lune's response in all the noise. "They say, you know-some scholars do-that not all faerie souls come to an end when their life does. That some go onward, though where, they do not know: perhaps Heaven or h.e.l.l, or the deep reaches of Faerie, or somewhere else entirely."

Curious, Irrith asked, "Do you believe it?"

"I do."

They were no longer riding in a straight line along the river; with London stretching so far north, they had to make gentle bends, sweeping the city and even crossing into Southwark. Their ghostly horde grew ever larger. Lune tried turning to survey their ranks, but quit when she slipped in her saddle. "I've seen it happen-at least, I think so. The faerie in question vanished, so who can say what happened to her. But I believe her spirit continued on."

Irrith had heard the stories, but dismissed them as-well, as mortals dismissed stories of faeries. Charming fictions. Then again, faeries were not fictions, so perhaps their continuance wasn't, either. But this wasn't the certainty mortals had, one of two choices, or maybe Purgatory if the Catholics were right. It was a true mystery, with nothing but guesses to light the path, and all of those guesses possibly wrong. Maybe there was nothing for the fae but black void, the end of all existence.

"Which would you choose?" Irrith asked. They were crossing above the western city now, from the hovels of Seven Dials to the townhouses of Grosvenor Square. She wondered who left more ghosts, the poor or the wealthy. The poor died in greater numbers, certainly, but who clung harder to this world?

The Queen bent her head until her chin almost touched the black shadow of her riding jacket. "Sometimes I envy the mortals their a.s.surance of continuation. But when I am weary, then I think it preferable to end as we do-a true end, with nothing after. Rest at last."

Valentin Aspell's voice whispered in memory, saying, a sacrifice. a sacrifice.

Weariness. Had it worn on Lune so much she would welcome that end? Especially if it would save her people?

Irrith suddenly wished she'd never come out this night, never accepted Lune's invitation to ride at her side. And she spared an additional wish that they'd been riding sticks of transformed straw instead, rather than two faeries who had no doubt been eavesdropping on this entire conversation.

Fortunately, they were almost done. Lune had timed their ride well, no doubt from centuries of experience: as they flew above Hyde Park, leaving the habitations of London behind, distant church bells began to toll. Twelve strokes for midnight, and Irrith twisted in her saddle to watch as behind them, the ghosts began to fade away. Their mighty host, a thick veil of white, thinned and fluttered apart, voices whispering their last. He'll regret. Remember me. My child... He'll regret. Remember me. My child...

Then the thirteen fae and their mounts were alone in the night sky, with Teyrngar loping a circle around them, and it was All Saints' Day.

"What would you choose, Irrith?" The Queen patted her mount's neck with her crippled hand, and he turned homeward. "I doubt He would permit us into Heaven, but if you had a choice between the torments of h.e.l.l, or nothing whatsoever."

Irrith didn't even have to think about it. "h.e.l.l. Anything's more interesting than just stopping stopping."

Lune's smile shone briefly in the night. "I am not surprised. Well, fate willing, you will not face that choice soon."

The Onyx Hall, London: November 3, 1758 Despite the press of time, Galen hesitated to tell anyone what Abd ar-Rashid had said. He had James Cole, the mortal keeper of the Onyx Court's library, dig out what old alchemical ma.n.u.scripts they possessed, and lost himself in a welter of incomprehensible symbolism: green lions and dragon's teeth, playing children and mating dogs, severed heads and homunculi and strange hermaphrodites. He could make little sense of it, but the genie was right on one count; the image of the moon queen appeared again and again.

In the end, there was nothing he could do but tell Lune. She listened in silence, and when he was done, merely said, "We should discuss this with Dr. Andrews."

Summoning him would invite an audience of courtiers, or else avid whispers when Lune sent them away; instead, the Queen and Prince went to his laboratory. Since their conversation a few weeks before, the doctor had set up an entire table full of pendulums, whose purpose Galen could not begin to guess.

Andrews himself looked like a corpse that had not slept in a week, but febrile vitality shone in his eyes as he came forward to greet them. "You've come at a happy time-I have something to show you."

Heedless of Galen's half-voiced protest, the doctor hurried over to the table. "I've weighted these bobs differently, with different substances," Andrews said, "and timed them against that clock." He nodded at a regulator positioned on the wall behind. "It's a repet.i.tion of an experiment Newton performed in the early 1680s, which caused him to discard his notion of aether. Let me show you-"

It was clear he wouldn't be easily diverted, but he could be sped along. "You needn't repeat the experiment again," Galen said. "We trust your work. Just tell us your conclusion."

"Aether does does exist." exist."

Lune stood a short distance away, hands gently clasped against her skirts. "I fear I haven't Lord Galen's education, Dr. Andrews. What does that mean?"

"Aether," he repeated, p.r.o.nouncing the word clearly. "Said by Aristotle to be the fifth element, the quintessence quintessence. At the time that Newton performed this experiment, the thought was that aether existed everywhere, penetrating all solid things. His pendulums showed that it did not. My My pendulums show that it does." pendulums show that it does."

Galen understood his point-to an extent. "Another facet of reality that's different in faerie s.p.a.ces. But what is the significance?"

"Faerie s.p.a.ces! Exactly, Mr. St. Clair. I propose-though I've had little time to think it through; I've only just finished the calculations for the pendulums-that it is the presence of aether which defines defines faerie s.p.a.ces, and differentiates them from ordinary ones. And furthermore, it may resolve a conundrum I've been pondering for some time now." faerie s.p.a.ces, and differentiates them from ordinary ones. And furthermore, it may resolve a conundrum I've been pondering for some time now."

His voice, Galen noticed, was lighter than it had been, as if Andrews were speaking using only his throat, not the resonance of his chest. A sign of the man's agitated excitement? Or a symptom of his worsening illness? I fear we'll lose him before we're done. I would fear to lose him at all, but I'm not sure it can be avoided-not by any means short of the philosopher's stone. I fear we'll lose him before we're done. I would fear to lose him at all, but I'm not sure it can be avoided-not by any means short of the philosopher's stone.

"The Dragon," Andrews said, recalling Galen to himself, "is a spirit of fire. So people have told me on many occasions. And I've heard the tale of its exile, the light of its heart being projected onto the comet. But what of its body? Is it a spirit, or a creature?"

Lune, the only one of them who had seen it with her own eyes, said, "It had a body. What we placed in the prison was its heart."

"Then what was its body composed of?" Andrews asked. "If the spirit is fire, and if those elements obtain in this world-"

"Aether." Now Galen saw what he aimed at. "You think faerie bodies are aethereal."

"They could be. The transmission of your Dragon to the comet could, I think, have given it an airy component, which is why I judge it to be sophic sulphur, which shares the qualities of fire and air. And at present-if I am right-it is fire and air without without aether, for it is without a body." Andrews's vitality seemed to drain away all at once. His hand groped vaguely in the air; then he turned, searched, and found a chair next to his main working table, into which he sank with a sigh. "But we have only one half of the equation. We still need sophic mercury." aether, for it is without a body." Andrews's vitality seemed to drain away all at once. His hand groped vaguely in the air; then he turned, searched, and found a chair next to his main working table, into which he sank with a sigh. "But we have only one half of the equation. We still need sophic mercury."

Galen wished-rather childishly-that Lune would be the one to tell him about their concerns. But no; this was his responsibility, and he knew it. "That is what we came for, Dr. Andrews. There is... a difficulty."

He paced a few steps, made himself stop, and clasped his hands behind his back. "If what you say is correct, then we must separate the principle from its aethereal component-yes? But the only established method for doing so would kill the source. And that isn't acceptable."

"The source..." Andrews's fingers curled into the stained handkerchief they held. "Mr. St. Clair-have you found one?"

"Abd ar-Rashid believes he has," Galen answered, each word coming out leaden with reluctance.

"Where?"

He couldn't say it. Tension rendered him mute. Lune, motionless where she stood, did it for him. "In me."

Andrews shot to his feet and staggered, off balance, before catching himself against the table. "You- Ah, yes, it would would be feminine, I suppose-" be feminine, I suppose-"

"It is the moon queen," she said, and her hair seemed to shine brighter with the words, as if to make her point. "Matched with the sun king. I know a little of alchemy, from old experience, and I believe the genie is right."

"But we can't do it," Galen said, finding his tongue once more. "At least, not in the same manner as the Dragon. There are two things you must understand, Dr. Andrews. The first is that no one-no one-can be permitted to hear of this. We three know, and Abd ar-Rashid, but even the rest of the scholars must be kept in the dark. Our problems are not merely intellectual, but also political; the danger of this news is very great."

The doctor nodded, clearly only half-attending to Galen's words. "The second," Galen went on, more forcefully still, "is that we will not not proceed with any attempt to create the philosopher's stone unless we have devised a way to extract this principle without harming her Grace. Or for that matter, any other faerie, should a subst.i.tute be found. Do you understand?" proceed with any attempt to create the philosopher's stone unless we have devised a way to extract this principle without harming her Grace. Or for that matter, any other faerie, should a subst.i.tute be found. Do you understand?"

Andrews's eyes cleared of their fog, and this time his nod was more sincere-but also hesitant. "I do, Mr. St. Clair. Your Majesty. If I may, ah, present a certain argument, though..."

"You may always speak," Lune a.s.sured him. "We brought you here for your thoughts; they are of no use to anyone if not shared."

He twisted his bony hands around one another and began to wander, stepping on his fallen handkerchief as he went. "The philosopher's stone is more than a means of creating gold. It is perfection, and it creates creates perfection. It has the potential to heal every gouty gentleman in Westminster, every fever-stricken child in Seven Dials-to transform our society into a veritable paradise on earth. perfection. It has the potential to heal every gouty gentleman in Westminster, every fever-stricken child in Seven Dials-to transform our society into a veritable paradise on earth.

"At the present moment, we have, or believe we have, one half of what is needed, which-if true-is further than any alchemist has likely got since the world began. Nor is it some tiny spark of a salamander's heart, either: it is a Dragon Dragon. One stripped of its body, which has voyaged through s.p.a.ce itself. A purity and power unmatched by any other."

He paused for breath, and Galen spoke into the gap. "You believe this to be, not just a chance to make the philosopher's stone, but our only only chance." chance."

Andrews managed a faint laugh. "As much as I can be sure of anything, which is not much. But yes-if it can be done at all, I think it can be done now. And perhaps not ever again. And madam..." The beseeching in his face was painful to see. "Is that not an achievement worthy of sacrifice?"

For the briefest instant, Galen though he saw a glitter in Andrews's eyes. A strange light, that saw beyond reality-even the reality of a faerie palace-into visions of that which was not. Only a touch, the merest whisper of madness... but it was there.

Or perhaps Galen imagined it, because the alternative was too dreadful to contemplate. That a man, in full possession of his sanity, might suggest that Lune sacrifice her life.

He could not bear to look at Lune, and therefore heard only her voice, as cool and unruffled as ever. "Dr. Andrews-this is still no more than speculation. You can craft a pretty argument that alchemy works in this realm, and that the Dragon is your sulphur; but we have no certainty that it's true."

To Galen's relief, Andrews nodded, with no sign of mad delusion. "This was the flaw of Aristotle; he and his brethren thought the world could be understood by reasoning alone, without need of experimental testing. Our situation is unfortunately complicated by the impossibility of proper tests; when the Dragon comes, we will have only a single chance to transform it. I'm aware of the uncertainty, madam, and will do everything I can do reduce it. But I beg you-as abominable as it is of me to say this-please consider what we stand to gain."

Galen's mouth gone dry. It wasn't madness, as much as he wished it were. If their reasoning proved correct, then the benefit would be incalculable.

But so would the cost.

Hating himself for that thought, Galen finally turned to Lune. Speaking as much to her as to the doctor, he said, "But we will will find another way. That, Dr. Andrews, is what the experimentation is for. Like miners, we will draw the metal from the ore." He cursed his choice of metaphor the instant it left his mouth, as his imagination supplied him with reminders of smelting. The ore did not survive the process unharmed. find another way. That, Dr. Andrews, is what the experimentation is for. Like miners, we will draw the metal from the ore." He cursed his choice of metaphor the instant it left his mouth, as his imagination supplied him with reminders of smelting. The ore did not survive the process unharmed.

Still, Andrews nodded. His expression had gone thoughtful again. "It will be difficult, Mr. St. Clair, to work on that matter without the a.s.sistance of your scholars. Two mortal men and one heathen faerie-we aren't likely to get far on our own."

Lady Feidelm, Wrain, Savennis. More distantly, the von das Tickens and Ktistes. Lune moved for the first time since she had entered, studying the room; not the furnishings, but the walls and fittings. "We can ensure that nothing said in here will be overheard. I would keep the number to a minimum-only those that work with you here. That, I think, will be safe enough."

So not the dwarves or the centaur. Galen wondered it if was mere accident that excluded the foreigners. Well, Lady Feidelm is Irish. She has been here longer, though, and proved her loyalty to this court. Well, Lady Feidelm is Irish. She has been here longer, though, and proved her loyalty to this court. And Abd ar-Rashid-but they could hardly leave him out, when he was the one who pointed to the moon queen in the first place. And Abd ar-Rashid-but they could hardly leave him out, when he was the one who pointed to the moon queen in the first place.

"Be careful," Galen said, bowing to necessity. "And work fast. The sooner we have an alternative, the safer we will all be."