“Then let us wash our hands of the Calculus Dispute and move on to Metaphysicks and Natural Philosophy. For I have long suspected-and Dr. Waterhouse will support me on this-that the Calculus Dispute was really an epiphenomenon of a far more profound, interesting, and momentous debate. Baron von Leibniz has served my House well as court philosopher; Sir Isaac, I trust, is desirous of doing likewise.”

“It is chief among my aspirations, highness,” Newton responded. This elicited a slight eye-roll from Leibniz, who glanced toward Daniel for support, but Daniel affected not to notice, and remained grave of aspect.

“I wonder if any royal House in the history of this world has enjoyed the distinction of being served, at the same time, by two such eminent philosophers! It is a rare thing, and I mean to make the most of it. You are both Christians, believers in a living and active God. You both hold that humans are made in God’s image, possessing free will. In Mathematicks and Natural Philosophy, your interests run on very similar lines. And yet there is between you a schism as deep as that between Scylla and Charybdis-a fundamental divergence of views that makes it impossible for you to collaborate with each other. Which were not such a bad thing, perhaps, if I were still Princess of Ansbach or some other tiny place, and you, sir, a Librarian and you, sir, a Vicar. But I am Princess of Wales. The House you both now serve is a great one-some would say, second only to the House of Bourbon. If the philosophy of that House is confused, why, it shall have dreadful consequences, dificult to foretell. A year ago, I asked Dr. Waterhouse to journey hither from Boston, that we might go to work healing this breach. That you, Sir Isaac, and you, Baron von Leibniz, are here together in this room now, is all his doing; but he did it at my command. His part in the thing is done and he has my gratitude forever. Your parts, gentlemen, begin now.”

“Highness,” said Newton, “I am grateful to you for having stated with such clarity the truth of my views on God, the human spirit, and free will. For Baron von Leibniz, I am sorry to report, has disseminated the slander that I am some sort of Atheist. While it is true that I reject the doctrine of the Trinity, please know that I do so only out of a belief that the Homoousian doctrine promulgated at the Council of Nicaea was an error, a straying from what Christians had believed until then, and ought to believe now-”

“Any person who seeks slander need not look so far afield, nor delve so deep!” Leibniz exclaimed, rising to his feet so forcefully that he had to take half a step toward Newton to steady himself. “I saved this man’s life three days ago, and gossip has already reached my ears that I am guilty of assaulting him! These willful distortions, sir, do nothing to bring us nigher true Philosophy!”

“I cannot imagine any slander more base than that I am an Atheist!” returned Newton. Because of his ribs, it was much more difficult for him to rise from his chair, but now he got his walking-stick under his folded hands as if he were about to give it a go.

“An Atheist? No. Never would I spread such a calumny-on my honor! But spreading doctrines that incline others toward Atheistical views is another matter. Of that you are, I regret to say, culpable.”

“Can one believe the incoherence of the man?!” Newton burst out, and regretted it, for it hurt to speak so vehemently. As long as his ribs were complaining anyway, he rose to his feet, then continued the outburst in a voice distorted by pain. “I am not an Atheist, he claims to admit-then he turns around and accuses me of spreading Atheism! It is typical of his slippery discourse, his slippery metaphysics!”

They were interrupted, but only for a moment, by a thud emanating from the floor between them. For Princess Caroline, disgruntled and bored, had used the palm of her hand to roll the globe up out of its cradle and over the rim of the felt-padded Great Circle that held it captive. It had tumbled to the rug between Newton and Leibniz. She put a foot up on it-a most undignified posture, for a Princess-and began to roll it back and forth idly as the argument went on.

“I do not think it is the least bit slippery,” said Leibniz. “You may be the most sincere Christian in the world, sir, but if you publish doctrines that are obscure, incoherent, contradictory, and impossible for readers to follow, why, they may go a-stray in their thinking and tend towards doctrines you would never espouse.”

“This is how you make amends for a false accusation of Atheism-by saying my life’s work is incoherent and contradictory? Pray do not make any more such apologies, sirrah, or I shall have to make amends to you by challenging you to a duel!”

Princess Caroline gave the globe a hard shove, and it rolled for a few yards across the carpet and scored a goal, as it were, in a large fireplace that accounted for most of one wall of the room. The hearth was slightly lower than the floor of the room, so the globe lodged there, and came to a stop between two andirons. “That globe will never do, for a modern Monarch,” she announced. “When the Prince of Wales and I move to this house, it shall have to be replaced by a new one, with more of geography and fewer of monsters and mermaids. One that shall be ready to receive Lines of Longitude whensoever that Roger Comstock finds someone to award his Prize to.” She rose now to her feet, and Newton and Leibniz, finally remembering their manners, turned to track her as she walked toward the fireplace. First, though, she wrenched a burning taper from a chair-side candelabrum. “As a rule I am averse to burning things found in Libraries, but this must be reckoned no loss at all, compared to the damage that the two of you are inflicting on Philosophy by your bickering.” She bent her knees and executed a graceful descent until she was sitting on the floor beside the hearth, skirts arranged around her. “I see things sometimes, in dreams or in day-dreams-some of them I quite fancy, for they seem to carry meaning. Those I remember, and think back on. There is one such vision that has got stuck in my head, quite as melodies often do, and I can’t seem to get rid of it. I shall try to do justice to it thusly.” And she reached out with the candle and let its flame lave the underside of the globe. The globe was of wood, and too heavy to catch fire readily; but paper gores printed with images of continents had been pasted over it. The paper caught fire, and a ragged flame-ring began to spread, consuming the cartographer’s work and leaving behind it a blackened and featureless sphere. “Sophie kept trying to tell me, before she died, that a new System of the World was being made. Oh, it is not a terribly novel thing to say. I know, and Sophie knew, that the third volume of your Principia Mathematica bears that name, Sir Isaac. Since she died, I have become quite convinced that she was correct-and moreover that the System is to be born, not at Versailles, but here-that this shall be its Prime Meridian, and all else shall be reckoned, and ruled, from here. It is a pleasing notion that there is to be such a System, and that I might play some small part in being its midwife. I think of the globe, with its neat parallels and meridians, as the Emblem of this System-what the Cross is to Christianity. But I am troubled by the vision of such a Globe in flames. What you are looking at here is a poor rendition of it; in my nightmares, it is ever so much more lovely and dreadful.”

“What do you suppose that vision signifies, highness?” asked Daniel Waterhouse.

“That this System, if it is set up wrong, might be doomed from the start,” said Caroline. “Oh, it shall be a wonder to behold at first, and all shall marvel at its regularity, its ?conomy, and the ingenuity of them who framed it. Perhaps it shall work as planned for a decade, or a century, or more. And yet if it has been made wrong at the beginning, it shall burn, in the end, and my vision shall be realized in a manner infinitely more destructive than this.” She gave the smoking globe a nudge. It had been wholly scoured by the flames and become a trackless black orb.