She’d been trying to figure out why her uncle was the way he was. And not in a conniving way, but, it seemed, out of a sincere desire to be a good and understanding help-meet to this weird old man who had become, in effect, her new father. Daniel had written eight drafts of his letter back to her, for he knew perfectly well that one day Isaac would find it among her effects, and read it. He would read it every bit as shrewdly as a challenge from Leibniz.

Everyone knows Isaac as a brilliant man, and treats him as such, which is a mistake; for he is as pious as he is brilliant, and his piety taketh precedence. Mind you, I speak not of outward, conspicuous piety but of an inner fire, a light under the bushel as ’twere, a yearning to draw nearer to God through exercise of God-given faculties.

“Your advice was of inestimable value to me, after I recovered-thanks be to God-and returned to London. And insofar as I have been of any help whatever to Uncle Isaac, I daresay what you wrote was a boon to him as well.”

“I shall not hold my breath waiting for an expression of gratitude from him,” Daniel said, hoping it sounded like a wry thing to say. She had the good grace to laugh out loud. Daniel got the impression she was accustomed to having men blurt indiscreet things to her, and regarded it as excellent sport.

“Oh, nonsense! You understand him better than any man alive, Dr. Waterhouse, and he is keenly aware of it.”

This-though she said it with dimples engaged-was really more of a threat than a compliment. What was more, Daniel knew that Catherine Barton had said it quite carefully and deliberately.

He decided to stop waiting for the formal introduction of Miss Catherine Barton to Dr. Daniel Waterhouse. It would never happen. She had vaulted over that hurdle with ribbons and skirts a-flying, and obliged him to follow. “You might enjoy a look round,” she suggested, arching her eyebrows spectacularly. She did not need to speak aloud the second half of the sentence: if you could only manage to pry your eyes off me. In truth, she was more presentable than beautiful. But she had some beautiful features. And she was very well-dressed. Not in the sense of showing off how much money she could spend, or how a la mode she could be, but rather in the sense that her attire presented to the world a full, frank, and exhaustive account of all that was admirable about her body. When she spun around to lead him across the vestibule, her skirts swirled around her buttocks and thighs in a way that made their contours fully known to Daniel. Or he phant’sied as much, which amounted to the same thing. He’d been wondering, for as long as he’d been in London, what it was about this woman that caused great and powerful men to recite appalling poetry about her in the Kit-Cat Clubb, and to go all glassy-eyed when her name came up in conversation. He should have known. Faces could beguile, enchant, and flirt. But clearly this woman was inflicting major spinal injuries on men wherever she went, and only a body had the power to do that. Hence the need for a lot of Classical allusions in Catherine Barton love-poetry. Her idolaters were reaching back to something pre-Christian, trying to express a bit of what they felt when they gazed upon Greek statues of nude goddesses.

There were plenty around. The vestibule was an oval room lined with niches that had stood vacant the last time Daniel had seen the place. The decades since had afforded Roger all the time he’d needed to bankroll raiding-parties on Classical ruins, or to commission original works. As he followed Miss Catherine Barton out of the room, Daniel spun round a full three hundred sixty degrees to scan the vestibule. The two servants who had pulled the doors open on Catherine’s command-both young men-were caught staring at their mistress’s backside. Both of them snapped their heads away and blushed. Daniel gave them a wink, turned, and followed her out.

“I have shown this house to visitors an hundred times,” she was saying, “and so all sorts of prattle is on the tip of my tongue-all of it perfectly boring to you, Dr. Waterhouse, to whom this house needs no introduction! You know we are crossing the central hall, and that the important rooms are to the left…” She meant the dining hall and the library. “And the odds and ends to the right…” (servant’s quarters, kitchen, back stairs, House of Office) “and the Withdrawing Room straight ahead. What is your pleasure? Do you need to retire that way?” she asked, glancing to the right. She was asking him if he needed to urinate or defecate. “Or is there anything you would like there?” glancing left-meaning, did he need to take any refreshment. She kept her hands clasped together in front of her bodice and pointed to the left or right with tiny movements of her eyes, obliging Daniel to gaze into them attentively. “To be proper, I should conduct you into the Withdrawing Room where we might have a great argument as to who should sit in which chair. But after the war, French manners are quite out of favor with us-especially us Whigs-and I cannot bring myself to be so formal with you, who are like another uncle to me.”

“I should only make an ass of myself-I who have spent twenty years in a wooden house!” Daniel returned. “Only tell me this, I pray you: if we go into the Withdrawing Room, can I see-”

“The volcano has been moved,” she said, quite solemn, as if afraid Daniel would be furious.

“Out of the house, or-”

“Oh, heaven forbid! No, ’tis the centerpiece of the house as ever, Doctor! It is only that this part of the house, which is to say, the part you designed, began to seem, in some of its rooms, rather more small than suited Roger’s tastes.”

“That is when Mr. Hooke was brought in to add the wings.”

“You know the story, Dr. Waterhouse, and so I shall not bore you, other than to say that the addition contains a ballroom that is at last large enough to exhibit the volcano in the style it deserves.” And with that she wheeled around and pushed open a pair of doors across the hall from the vestibule, allowing light to flood in from the windows of the Withdrawing Room. Daniel stepped in, and then stopped, a-mazed.

When this room had been laid out, those windows had commanded a view to the north across a pasture, soon to become a formal garden: a view near to Daniel’s heart, as it was practically the same as the one from the back of Drake’s old house. But now the garden had been truncated to a court-yard with a fountain in the center, and directly on the other side, a stone’s throw away, rose a Barock palace. This room, which Daniel had conceived as a quiet retreat from which to enjoy a vast prospect of flowers and greenery, had been reduced to a sort of viewing-gallery for contemplating the magnificence of the real house.

“Vanbrugh,” Catherine explained. The same one who was doing Blenheim Palace for the Duke of Marlborough.

“Hooke-”

“Mr. Hooke did the wings, which as you can see, embrace the courtyard, and connect your Temple to Mr. Vanbrugh’s, er…”

Fuck-house of the Gods was on the tip of Daniel’s tongue, but he could hardly throw stones at Vanbrugh since he had started it. All he could summon up was, “What an undeserved honour ’tis for me, that Vanbrugh should finish so grandly, what I started so plainly.”

The chairs in the Withdrawing Room were arranged in an arc facing toward the window. Catherine passed between two of them and opened a pair of French doors that in the original scheme had led out onto the long central promenade of the garden. Instead of which he followed her onto marble paving-slabs and pursued her around the kerb of an octagonal pool. It had a bronze fountain in the center of it, a great Classical action-scene: muscular Vulcan thrusting himself forth on massive but bent legs, having a go at Minerva, the cool helmet-head, who was pushing him back with one arm. Swords, daggers, helmets, and cuirasses were strewn all round, interspersed with the odd half-forged thunderbolt. Vulcan’s knobby fingers were ripping Minerva’s breastplate away to expose a body obviously modeled after Catherine Barton’s. Daniel recognized the tale: Minerva went to Vulcan’s forge to acquire weapons and armor; Vulcan became inflamed with lust and assaulted her; she, being one tough deity, held him at bay, and he had to settle for ejaculating on her leg. She wiped it off with a rag and flung it on the ground, fertilizing Mother Earth, who later bore Erichthonius, an early king of Athens, who introduced the use of silver money.